Unpolarized Standard Stars
A List of Polarized and Unpolarized Standard Stars for UKIRT
Below we list standards that may be useful for calibrating polarimetry observations at UKIRT. Some southern standards are also available from ESO.
- Unpolarized Standard Stars
- “Serkowski” Polarized Standards
- Polarized Standards from Whittet et al. (1992)
Unpolarized Standard Stars
The stars in this table are taken from “Planets, Stars & Nebulae studied with Photopolarimetry”, 1974, T. Gehrels (ed.), University of Arizona Press, Tuscon, pp. 168-169. Most unpolarized stars have large proper motions. If the stars in this list are not appropriate, then it is possible to look at other catalogues (e.g. Bright Star catalogue) for other stars with large proper motions. NOTE: Many of these sources are too bright for use with UFTI.
| Star | m_v | Spectral Type | R.A. (1950) | Dec. (1950) | Proper motion | Proper motion |
| HD 432 | 2.4 | F2 IV | 00 06 29.7 | +58 52 27 | +0.0679 | -0.177 |
| HD 9540 | 7.0 | G8 V | 01 30 52.9 | -24 25 55 | +0.0215 | -0.152 |
| HD 10476 | 5.2 | K1 V | 01 39 46.6 | +20 01 34 | -0.0209 | -0.668 |
| HD 18803 | 6.7 | G6 V | 02 59 27.7 | +26 24 56 | + 0.0176 | -0.161 |
| HD 20630 | 4.8 | G5 V | 03 16 44.1 | +03 11 17 | +0.0178 | +0.098 |
| HD 38393 | 3.6 | F6 V | 05 42 22.6 | -22 27 48 | -0.0212 | -0.373 |
| HD 39587 | 4.4 | G0 V | 05 51 25.2 | +20 16 07 | -0.0133 | -0.086 |
| HD 42807 | 6.5 | G6 V | 06 10 26.0 | +10 38 44 | +0.0062 | -0.285 |
| HD 61421 | 0.3 | F5 IV | 07 36 41.1 | +05 21 17 | -0.0473 | -1.029 |
| HD 65583 | 7.0 | G8 V | 07 57 26.5 | +29 21 59 | -0.0114 | -1.167 |
| HD 90508 | 6.5 | G1 V | 10 24 59.1 | +49 13 09 | -0.0004 | -0.010 |
| HD 98281 | 7.3 | G8 V | 11 15 49.2 | -04 47 37 | +0.0528 | -0.150 |
| HD 100623 | 6.0 | K0 V | 11 32 03.4 | -32 33 59 | -0.0536 | +0.821 |
| HD 102438 | 6.5 | G5 V | 11 44 45.4 | -30 00 20 | -0.0214 | -0.245 |
| HD 102870 | 3.6 | F8 V | 11 48 05.4 | +02 02 48 | +0.0494 | -0.275 |
| HD 103095 | 6.5 | G8 VI | 11 50 06.2 | +38 04 39 | +0.3387 | -5.806 |
| HD 114710 | 4.3 | G0 V | 13 09 32.4 | +28 07 52 | -0.0605 | +0.879 |
| HD 115617 | 4.8 | G6 V | 13 15 47.1 | -18 02 01 | -0.0754 | -1.072 |
| HD 125184 | 6.5 | G8 V | 14 15 21.1 | -07 18 32 | +0.0168 | -0.245 |
| HD 142373 | 4.6 | F9 V | 15 50 56.7 | +42 35 26 | +0.0396 | +0.628 |
| HD 144287 | 7.1 | G8 V | 16 01 59.5 | +25 22 52 | -0.0389 | +0.672 |
| HD 144579 | 6.7 | G8 V | 16 03 13.2 | +39 17 26 | -0.0493 | +0.055 |
| HD 154345 | 6.8 | G8 V | 17 01 11.6 | +47 08 23 | +0.0117 | +0.846 |
| HD 165908 | 5.0 | F7 V | 18 05 07.5 | +30 33 13 | -0.0075 | +0.071 |
| HD 185395 | 4.5 | F4 V | 19 35 06.0 | +50 06 16 | -0.0025 | 0.256 |
| HD 188512 | 3.7 | G8 IV | 19 52 51.4 | +06 16 36 | +0.0029 | -0.479 |
| HD 202573 | 7.0 | G5 V | 21 13 44.5 | +25 13 31 | -0.0046 | -0.032 |
| HD 202940 | 6.6 | G5 V | 21 16 52.5 | -26 33 36 | -0.0402 | -0.352 |
| HD 210027 | 3.8 | F5 V | 22 04 40.8 | +25 06 01 | +0.0220 | +0.028 |
| HD 216956 | 1.2 | A3 V | 22 54 53.5 | -29 53 16 | +0.0258 | -0.161 |
“Serkowski” Polarized Standards
Polarized standards are polarized by dichroic absorption in the interstellar (or intracloud) medium. The following “Serkowski” polarized standards are taken from “Planets, Stars & Nebulae studied with Photopolarimetry”, 1974, T. Gehrels (ed.), University of Arizona Press, Tuscon, p. 170. They are based on fitting the Serkowski Interstellar Polarization Law :
The maximum polarization, Pmax, occurs at the wavelength lmax.
| Star | R.A. (1950) | Dec. (1950) | P_max (%) | I_max (?m) | P.A. (degrees) | M_v |
| HD 7927 | 01 16 55.1 | +57 58 10 | 3.4 | 0.51 | 94 | 5.0 |
| HD 14433 | 02 18 22.3 | +57 00 54 | 3.9 | 0.51 | 122 | 6.4 |
| HD 21291 | 03 25 00.1 | +59 46 05 | 3.5 | 0.52 | 115 | 4.2 |
| HD 23512 | 03 43 36.3 | +23 28 12 | 2.3 | 0.6 | 30 | 8.1 |
| HD 43384 | 06 13 55.6 | +23 45 35 | 3.0 | 0.53 | 170 | 6.2 |
| HD 147084 | 16 17 37.4 | -24 03 02 | 4.3 | 0.67 | 32 | 4.6 |
| HD 154445 | 17 02 57.5 | -00 40 30 | 3.7 | 0.57 | 90 | 5.7 |
| HD 160529 | 17 38 41.2 | -33 28 47 | 7.2 | 0.53 | 20 | 6.7 |
| HD 183143 | 19 25 13.2 | -18 11 37 | 6.1 | 0.56 | 0 | 6.9 |
| HD 187929 | 19 49 55.5 | +00 52 33 | 1.8 | 0.56 | 93 | 3.5 – 4.3 |
| HD 198478 | 20 47 14.0 | +45 55 40 | 2.8 | 0.53 | 3 | 4.9 |
| HD 204827 | 21 27 31.3 | +58 31 13 | 5.6 | 0.46 | 60 | 7.9 |
Polarized Stars from Whittet et al. (1992)
Polarization observations in the UBVRIJHK bands were made with the Hatfield polarimeter (HATPOL) by Whittet et al. 1992, ApJ, 386, 562. The results from this study, for stars reachable from UKIRT, are shown here.
Only the IJHK polarizations are given here.Note: the K-band polarization observations were made in a non-standard K passband centred at 2.04 microns. Values appropriate to a more standard K-band filter have been calculated by Gerakines et al. (1995, ApJ, 455, L171) from power-law extrapolations of the Whittet et al. multi-colour polarisation measurements.
| –Star (2MASS mags) | –R.A. (1950) | -KDec. (1950) | m_v | Spectral Type | Band | P(%) | P.A. (degrees) |
| NGC 1333 #3 (J = 9.4, K=7.1) | 03 26 04.8 | +31 11 33 | – | – | I | 2.84 +/- 0.05 | 111 +/- 1 |
| – | – | – | – | – | J | 2.40 +/- 0.07 | 111 +/- 1 |
| – | – | – | – | – | H | 1.65 +/- 0.05 | 112 +/- 5 |
| – | – | – | – | – | K | 1.4 +/- 0.4 | 93 +/- 8 |
| NGC 1333 #5 bad coords? | 03 26 15.1 | +31 08 03 | – | – | I | 7.93 +/- 0.15 | 135 +/- 1 |
| – | – | – | – | – | J | 6.81 +/- 0.02 | 142 +/- 1 |
| – | – | – | – | – | H | 5.02 +/- 0.03 | 145 +/- 1 |
| – | – | – | – | – | K | 3.41 +/- 0.04 | 149 +/- 1 |
| Taurus, Elias 1 (J=8.7,K=5.8) double? | 04 15 34.6 | +28 12 01 | – | A5e | I | 5.31 +/- 0.07 | 3 +/- 1 |
| – | – | – | – | – | J | 4.30 +/- 0.04 | 1 +/- 1 |
| – | – | – | – | – | H | 2.93 +/- 0.05 | 177 +/- 1 |
| – | – | – | – | – | K | 2.16 +/- 0.13 | 176 +/- 2 |
| Taurus Elias 3 (J=8.3,K=5.8) | 04 20 22.6 | +24 53 13 | – | K2 III | I | 2.29 +/- 0.05 | 103 +/- 1 |
| – | – | – | – | – | J | 1.79 +/- 0.03 | 109 +/- 1 |
| – | – | – | – | – | H | 1.14 +/- 0.04 | 109 +/- 2 |
| – | – | – | – | – | K | 0.76 +/- 0.06 | 113 +/- 2 |
| Taurus Elias 9 (J=7.6,K=5.5) | 04 29 09.6 | +24 27 17 | – | M4 III | I | 0.38 +/- 0.08 | 1 +/- 4 |
| – | – | – | – | – | J | 0.44 +/- 0.02 | 145 +/- 3 |
| – | – | – | – | – | H | 0.41+/- 0.02 | 143 +/- 1 |
| – | – | – | – | – | K | 0.22 +/- 0.02 | 146 +/- 5 |
| Taurus Elias 19 (J=7.6,K=5.5) | 04 41 14.3 | +25 19 20 | – | M4 III | I | 5.22 +/- 0.06 | 36 +/- 1 |
| – | – | – | – | – | J | 3.06 +/- 0.05 | 36 +/- 1 |
| – | – | – | – | – | H | 1.94 +/- 0.03 | 35 +/- 1 |
| – | – | – | – | – | K | 1.36 +/- 0.03 | 38 +/- 1 |
| Taurus Elias 29 (J=8.2,K=6.8) | 04 34 12.0 | +25 11 30 | – | G9 III | I | 4.01 +/- 0.07 | 31 +/- 1 |
| – | – | – | – | – | J | 2.43 +/- 0.02 | 29 +/- 1 |
| – | – | – | – | – | H | 1.57 +/- 0.02 | 27 +/- 1 |
| – | – | – | – | – | K | 1.07 +/- 0.10 | 34 +/- 4 |
| HD 28170 | 04 24 31.7 | +24 57 03 | 8.95 | A5V | I | 1.65 +/- 0.03 | 89 +/- 1 |
| – | – | – | – | – | J | 1.03 +/- 0.02 | 89 +/- 1 |
| – | – | – | – | – | H | 0.59 +/- 0.02 | 90 +/- 1 |
| – | – | – | – | – | K | 0.49 +/- 0.12 | 87 +/- 10 |
| HD 28975 | 04 31 48.5 | +24 08 30 | 9.02 | A3 | I | 2.75 /- 0.04 | 57 +/- 1 |
| – | – | – | – | – | J | 1.77 +/- 0.05 | 60 +/- 1 |
| – | – | – | – | – | H | 1.03 +/- 0.06 | 62 +/- 2 |
| – | – | – | – | – | K | 0.87 +/- 0.12 | 39 +/- 6 |
| HD 29333 | 04 35 17.1 | +29 17 18 | 8.5 | A2 | I | 4.75 +/- 0.09 | 71 +/- 1 |
| – | – | – | – | – | J | 2.88 +/- 0.03 | 69 +/- 1 |
| – | – | – | – | – | H | 1.81 +/- 0.04 | 68 +/- 1 |
| – | – | – | – | – | K | 1.19 +/- 0.08 | 73 +/ 3 |
| HD 29647 | 04 38 03.7 | +25 53 51 | 8.37 | B6-7 IV | I | 2.33 +/- 0.06 | 74 +/- 1 |
| – | – | – | – | – | J | 1.70 +/- 0.02 | 78 +/- 1 |
| – | – | – | – | – | H | 1.08 +/- 0.02 | 77 +/- 1 |
| – | – | – | – | – | K | 0.73 +/- 0.06 | 80 +/- 2 |
| HD 29835 | 04 40 00.4 | +26 09 00 | 8.70 | K2 III | I | 3.45 +/- 0.06 | 25 +/- 1 |
| – | – | – | – | – | J | 1.82 +/- 0.05 | 23 +/- 1 |
| – | – | – | – | – | H | 1.12 +/- 0.06 | 20 +/- 3 |
| – | – | – | – | – | K | 0.87 +/- 0.07 | 14 +/- 8 |
| HD 30675 | 04 47 44.0 | +28 13 47 | 7.6 | B3 | I | 3.32 +/- 0.09 | 58 +/- 1 |
| – | – | – | – | – | J | 1.90 +/- 0.09 | 58 +/- 1 |
| – | – | – | – | – | H | 1.10 +/- 0.08 | 61 +/- 4 |
| – | – | – | – | – | K | 0.74 +/- 0.12 | 62 +/- 7 |
| HDE 279652 | 04 14 50.2 | +37 35 54 | 9.82 | A2 V | I | 1.03 +/- 0.05 | 86 +/- 1 |
| – | – | – | – | – | J | 0.61 +/- 0.03 | 91 +/- 2 |
| – | – | – | – | – | H | 0.45 +/- 0.04 | 93 +/- 3 |
| – | – | – | – | – | K | – | – |
| HDE 279658 | 04 13 47.3 | +37 09 32 | 9.91 | B7 V | I | 2.43 +/- 0.09 | 144 +/- 1 |
| – | – | – | – | – | J | 1.42 +/- 0.03 | 147 +/- 1 |
| – | – | – | – | – | H | 0.86 +/- 0.04 | 146 +/- 1 |
| – | – | – | – | – | K | – | – |
| HDE 283637 | 04 22 53.3 | +27 30 18 | 11.27 | B9 | I | 2.50 +/- 0.07 | 8 +/- 1 |
| – | – | – | – | – | J | 1.57 +/- 0.05 | 6 +/- 1 |
| – | – | – | – | – | H | 1.12 +/- 0.06 | 6 +/- 6 |
| – | – | – | – | – | K | – | – |
| HDE 283701 | 04 31 49.3 | +27 06 03 | 9.66 | A0 V | I | 3.04 +/- 0.07 | 33 +/- 1 |
| – | – | – | – | – | J | 1.68 +/- 0.12 | 42 +/ 5 |
| – | – | – | – | – | H | 1.36 +/- 0.09 | 35 +/- 3 |
| – | – | – | – | – | K | 0.86 +/- 0.08 | 23 +/- 8 |
| HDE 283725 | 04 35 58.9 | +28 44 38 | 10.8 | F5 | I | 4.16 +/- 0.07 | 65 +/- 1 |
| – | – | – | – | – | J | 2.50 +/- 0.03 | 66 +/- 1 |
| – | – | – | – | – | H | 1.60 +/- 0.03 | 65 +/- 1 |
| – | – | – | – | – | K | 1.23 +/- 0.09 | 69 +/- 5 |
| HDE 283800 | 04 40 21.4 | +26 56 03 | 9.78 | B5 V | I | 3.58 +/- 0.07 | 27 +/- 1 |
| – | – | – | – | – | J | 1.94 +/- 0.08 | 27 +/- 1 |
| – | – | – | – | – | H | 1.36 +/- 0.06 | 29.2 |
| – | – | – | – | – | K | – | – |
| HDE 283809 (J=7.0,K=6.2) | 04 38 20.6 | +25 49 05 | 10.78 | B3 V | I | 6.27 +/- 0.03 | 52 +/- 1 |
| – | – | – | – | – | J | 3.81 +/- 0.07 | 57 +/- 1 |
| – | – | – | – | – | H | 2.59 +/- 0.07 | 58 +/- 1 |
| – | – | – | – | – | K | 1.71 +/- 0.11 | 55 +/- 3 |
| HDE 283812 | 04 41 21.0 | +25 26 13 | 9.54 | A2 V | I | 5.68 +/- 0.07 | 31 +/- 1 |
| – | – | – | – | – | J | 3.21 +/- 0.06 | 32 +/- 1 |
| – | – | – | – | – | H | 2.09 +/- 0.04 | 31 +/- 1 |
| – | – | – | – | – | K | 1.31 +/- 0.07 | 35 +/- 2 |
| HDE 283855 | 04 45 06.5 | +26 56 32 | 11.4 | A2 | I | 4.37 +/- 0.08 | 46 +/- 1 |
| – | – | – | – | – | J | 2.58 +/- 0.03 | 46 +/- 1 |
| – | – | – | – | – | H | 1.67 +/- 0.06 | 47 +/- 3 |
| – | – | – | – | – | K | – | – |
| HD 38563A | 05 44 09.5 | +00 03 33 | 10.42 | B3-5 | I | 4.22 +/- 0.03 | 99 +/- 1 |
| – | – | – | – | – | J | 2.58 +/- 0.05 | 100 +/- 2 |
| – | – | – | – | – | H | 1.57 +/ 0.05 | 97 +/- 1 |
| – | – | – | – | – | K | 0.61 +/- 0.06 | 93 +/- 5 |
| HD 38563B | 05 44 10.9 | +00 04 17 | 10.56 | B2 II-III | I | 2.57 +/- 0.07 | 8 +/- 1 |
| – | – | – | – | – | J | 1.85 +/- 0.05 | 11 +/- 1 |
| – | – | – | – | – | H | 1.20 +/- 0.08 | 15 +/- 2 |
| – | – | – | – | – | K | 0.59 +/- 0.16 | 12 +/- 9 |
| HD 38563C | 05 44 11.5 | +00 01 38 | 13.09 | A0 II | I | 8.96 +/- 0.26 | 72 +/- 1 |
| – | – | – | – | – | J | 6.03 +/- 0.10 | 71 +/- 1 |
| – | – | – | – | – | H | 3.68 +/- 0.10 | 70 +/- 1 |
| – | – | – | – | – | K | 2.21 +/- 0.55 | 78 +/- 17 |
| CMa R1 #24 | 07 02 26.2 | -10 51 41 | 13.31 | A0 V | I | 3.24 +/- 0.10 | 89 +/- 1 |
| – | – | – | – | – | J | 2.10 +/- 0.05 | 86 +/- 1 |
| – | – | – | – | – | H | 1.43 +/- 0.10 | 88 +/- 3 |
| – | – | – | – | – | K | – | – |
| r-Oph Elias 14 | 16 23 01.7 | -24 16 50 | – | – | I | 6.67 +/- 0.07 | 2 +/- 1 |
| – | – | – | – | – | J | 4.95 +/- 0.02 | 2 +/- 1 |
| – | – | – | – | – | H | 3.24 +/- 0.03 | 3 +/- 1 |
| – | – | – | – | – | K | 1.95 +/- 0.03 | 3 +/- 1 |
| r-Oph Elias 22 | 16 23 22.0 | -24 14 15 | – | – | I | 5.25 +/- 0.07 | 178 +/- 1 |
| – | – | – | – | – | J | 3.79 +/- 0.02 | 176 +/- 1 |
| – | – | – | – | – | H | 2.21 +/- 0.03 | 177 +/- 1 |
| – | – | – | – | – | K | 0.99 +/- 0.05 | 1 +/- 2 |
| r-Oph Elias 25 | 16 23 32.8 | -24 16 44 | 17.01 | B3 V | I | 8.96 +/- 0.09 | 23 +/- 1 |
| – | – | – | – | – | J | 6.46 +/- 0.02 | 24 +/- 1 |
| – | – | – | – | – | H | 4.13 +/- 0.02 | 24 +/- 1 |
| – | – | – | – | – | K | – | – |
| HD 147283 | 16 18 56.4 | -24 22 40 | 10.27 | A3 V | I | 1.62 +/- 0.07 | 174 +/- 1 |
| – | – | – | – | – | J | 1.17 +/- 0.03 | 173 +/- 1 |
| – | – | – | – | – | H | 0.91 +/- 0.05 | 172 +/- 2 |
| – | – | – | – | – | K | 0.48 +/- 0.04 | 171 +/- 7 |
| HD 147343 | 16 19 18.8 | -24 14 47 | 9.36 | A1 V | I | 0.24 +/- 0.08 | 140 +/- 7 |
| – | – | – | – | – | J | 0.22 +/- 0.03 | 128 +/- 4 |
| – | – | – | – | – | H | 0.45 +/- 0.06 | 87 +/- 4 |
| – | – | – | – | – | K | 0.33 +/- 0.10 | 137 +/- 7 |
| HD 147648 | 16 21 00.3 | -25 17 59 | 9.42 | B8 V | I | 0.75 +/ 0.04 | 41 /- 1 |
| – | – | – | – | – | J | 0.36 +/- 0.03 | 43 +/- 3 |
| – | – | – | – | – | H | 0.32 +/- 0.03 | 40 +/- 3 |
| – | – | – | – | – | K | 0.17 +/- 0.01 | 40 +/- 9 |
| HD 150193 | 16 37 16.4 | -23 47 56 | 8.81 | A0e | I | 4.99 +/- 0.06 | 57 +/- 1 |
| – | – | – | – | – | J | 3.27 +/- 0.06 | 57 +/- 1 |
| – | – | – | – | – | H | 2.26 +/- 0.03 | 60 +/- 1 |
| – | – | – | – | – | K | 1.68 +/- 0.02 | 60 +/- 1 |
| R Cra #2 | 18 58 31.8 | -37 13 17 | 12.84 | F7 III | I | 1.96 +/- 0.10 | 7 +/- 1 |
| – | – | – | – | – | J | 1.54 +/- 0.03 | 8 +/- 1 |
| – | – | – | – | – | H | 1.09 +/- 0.02 | 9 +/- 1 |
| – | – | – | – | – | K | 1.13 +/- 0.15 | 171 +/- 8 |
| R Cra #10 | 18 59 48.8 | -37 33 56 | 10.07 | B8 V | I | 0.63 +/- 0.04 | 167 +/- 2 |
| – | – | – | – | – | J | 0.60 +/- 005 | 172 +/- 2 |
| – | – | – | – | – | H | 0.39 +/- 0.05 | 172 +/- 4 |
| – | – | – | – | – | K | 0.30 +/- 0.08 | 140 +/- 16 |
| R Cra #12 | 19 01 27.7 | -37 43 51 | 11.87 | G8 III | I | 0.76 +/- 0.05 | 126 +/- 2 |
| – | – | – | – | – | J | 0.66 +/- 0.04 | 127 +/- 2 |
| – | – | – | – | – | H | 0.40 +/- 0.04 | 131 +/- 3 |
| – | – | – | – | – | K | 0.28 +/- 0.13 | 141 +/- 13 |
| R Cra #13 | 19 01 58.8 | -37 30 03 | 12.70 | K1 III | I | 2.71 +/- 0.07 | 97 +/- 1 |
| – | – | – | – | – | J | 2.21 +/- 0.03 | 96 +/- 1 |
| – | – | – | – | – | H | 1.40 +/- 0.03 | 94 +/- 1 |
| – | – | – | – | – | K | 0.86 +/- 0.15 | 102 +/- 5 |
| R Cra #15 | 19 01 49.5 | -37 33 50 | 13.27 | G1 | I | 3.18 +/- 0.09 | 96 +/- 1 |
| – | – | – | – | – | J | 2.28 +/- 0.03 | 96 +/- 1 |
| – | – | – | – | – | H | 1.44 +/- 0.06 | 100 +/- 2 |
| – | – | – | – | – | K | – | – |
| R Cra #22 | 18 59 55.8 | -36 57 57 | 11.5 | K5 III | I | 1.04 +/- 0.07 | 84 +/- 2 |
| – | – | – | – | – | J | 0.48 +/- 0.02 | 83 +/- 3 |
| – | – | – | – | – | H | 0.29 +/- 0.05 | 80 +/- 5 |
| – | – | – | – | – | K | – | – |
| R Cra #28 | 18 57 36.6 | -36 46 00 | 10.54 | M5 III | I | 2.10 +/- 0.04 | 52 +/- 1 |
| – | – | – | – | – | J | 1.71 +/- 0.06 | 57 +/- 1 |
| – | – | – | – | – | H | 1.00 +/- 0.04 | 58 +/- 2 |
| – | – | – | – | – | K | 0.75 +/- 0.05 | 53 +/- 2 |
| R Cra #30 | 18 58 41.4 | -37 27 31 | 10.92 | A0 V | I | 1.89 +/- 0.04 | 137 +/- 1 |
| – | – | – | – | – | J | 1.48 +/- 0.03 | 137 +/- 1 |
| – | – | – | – | – | H | 1.03 +/- 0.03 | 139 +/- 1 |
| – | – | – | – | – | K | 0.29 +/- 0.13 | 167 +/- 12 |
| R Cra #43 | 18 54 58.4 | -37 12 04 | 9.55 | K0 III | I | 1.73 +/- 0.05 | 66 +/- 1 |
| – | – | – | – | – | J | 1.30 +/- 0.03 | 70 +/- 1 |
| – | – | – | – | – | H | 0.96 +/- 0.04 | 70 +/- 2 |
| – | – | – | – | – | K | 0.47 +/- 0.06 | 62 +/- 4 |
| R Cra #46 | 18 56 40.0 | -37 10 06 | 11.96 | G8 III | I | 2.78 +/- 0.07 | 33 +/- 1 |
| – | – | – | – | – | J | 2.18 +/- 0.05 | 33 +/- 1 |
| – | – | – | – | – | H | 1.37 +/- 0.04 | 32 +/- 1 |
| – | – | – | – | – | K | 0.87 +/- 0.03 | 29 +/- 3 |
| R Cra #50 | 18 55 26.0 | -37 17 04 | 10.69 | A6 V | I | 1.05 +/- 0.04 | 33 +/- 1 |
| – | – | – | – | – | J | 0.91 +/- 0.04 | 32 +/- 1 |
| – | – | – | – | – | H | 0.52 +/- 0.05 | 29 +/- 3 |
| – | – | – | – | – | K | – | – |
| R Cra #52 | 18 55 11.1 | -37 16 11 | 12.56 | G5 III | I | 1.99 +/- 0.08 | 39 +/- 1 |
| – | – | – | – | – | J | 1.38 +/- 0.04 | 39 +/- 1 |
| – | – | – | – | – | H | 0.84 +/- 0.02 | 38 +/- 1 |
| – | – | – | – | – | K | 0.69 +/- 0.07 | 51 +/- 4 |
| R Cra # 56 | 19 03 01.7 | -37 00 24 | 10.82 | G5 IV | I | 1.98 +/- 0.03 | 70 +/- 1 |
| – | – | – | – | – | J | 1.41 +/- 0.04 | 70 +/- 1 |
| – | – | – | – | – | H | 0.81 +/- 0.02 | 70 +/- 1 |
| – | – | – | – | – | K | 0.50 +/- 0.10 | 77 +/- 6 |
| R Cra #58 | 18 57 51.2 | -37 30 20 | 11.47 | K1 III | I | 0.75 +/- 0.06 | 176 +/- 2 |
| – | – | – | – | – | J | 0.58 +/- 0.04 | 178 +/- 2 |
| – | – | – | – | – | H | 0.30 +/- 0.09 | 173 +/- 7 |
| – | – | – | – | – | K | – | – |
| R Cra #71 | 19 03 28.2 | -37 13 19 | 12.13 | F6 V | I | 1.04 +/- 0.08 | 50 +/- 2 |
| – | – | – | – | – | J | 0.74 +/- 0.05 | 52 +/- 2 |
| – | – | – | – | – | H | 0.39 +/- 0.06 | 63 +/- 7 |
| – | – | – | – | – | K | – | – |
| R Cra #73 | 19 04 22.9 | -37 17 48 | 12.38 | G0 V | I | 1.80 +/- 0.07 | 86 +/- 1 |
| – | – | – | – | – | J | 1.16 +/- 0.05 | 84 +/- 1 |
| – | – | – | – | – | H | 0.75 +/- 0.01 | 86 +/- 1 |
| – | – | – | – | – | K | – | – |
| R Cra #88 | 19 027.0 | -37 22 48 | – | G8 | I | 4.86 +/- 0.13 | 87 +/- 1 |
| – | – | – | – | – | J | 3.87 +/- 0.06 | 90 +/- 1 |
| – | – | – | – | – | H | 2.73 +/- 0.07 | 92 +/- 1 |
| – | – | – | – | – | K | 1.84 +/- 0.09 | 95 +/- 1 |
| TY Cra (variable) | 18 58 18.5 | -36 56 51 | 9.10v | B9e | I | 0.74 +/- 0.06 | 94 +/- 2 |
| – | – | – | – | – | J | 0.43 +/- 0.07 | 89 +/- 3 |
| – | – | – | – | – | H | 0.41 +/- 0.05 | 106 +/- 3 |
| – | – | – | – | – | K | 0.26 +/- 0.03 | 104 +/- 4 |
| Cyg OB2 A | 20 30 43.7 | +41 03 53 | 13.12 | OB | I | 4.57 +/- 0.07 | 118 +/- 1 |
| – | – | – | – | – | J | 1.85 +/- 0.08 | 119 +/- 1 |
| – | – | – | – | – | H | 0.81 +/- 0.04 | 121 +/- 1 |
| – | – | – | – | – | K | 0.53 +/- 0.06 | 126 +/- 4 |
| Cyg OB2 No.3 | 20 29 49.9 | +41 03 08 | 10.22 | O9 | I | 4.60 +/- 0.06 | 106 +/- 1 |
| – | – | – | – | – | J | 2.80 +/- 0.03 | 105 +/- 1 |
| – | – | – | – | – | H | 1.81 +/- 0.03 | 105 +/- 1 |
| – | – | – | – | – | K | 1.15 +/- 0.04 | 108 +/- 1 |
| Cyg OB2 No. 4 | 20 30 26.3 | +41 16 57 | 10.22 | O7 III | I | 1.63 +/- 0.05 | 75 +/- 1 |
| – | – | – | – | – | J | 0.92 +/- 0.03 | 81 +/- 2 |
| – | – | – | – | – | H | 0.55+/- 0.03 | 79 +/- 3 |
| – | – | – | – | – | K | 0.33 +/- 0.07 | 52 +/- 10 |
| Cyg OB2 No.5 (variable) | 20 30 24.8 | +41 0804 | 9.1 | O7f | I | 3.17 +/- 0.03 | 82 +/- 1 |
| – | – | – | – | – | J | 0.78 +/- 0.02 | 52 +/- 1 |
| – | – | – | – | – | H | 0.42 +/- +/- 0.03 | 46 +/- 4 |
| – | – | – | – | – | K | 0.13 +/- 0.09 | 37 +/- 21 |
| Cyg OB2 No. 6 | 20 30 58.0 | +41 10 04 | 10.67 | O8 V | I | 1.31 +/- 0.03 | 50 +/- 1 |
| – | – | – | – | – | J | 0.78 +/- 0.02 | 52 +/- 1 |
| – | – | – | – | – | H | 0.42 +/- 0.03 | 46 +/- 4 |
| – | – | – | – | – | K | 0.13 +/- 0.09 | 37 +/- 21 |
| Cyg OB2 N.7 | 20 31 26.5 | +41 10 04 | 10.5 | O3 If | I | 3.02 +/- 0.03 | 95 +/- 1 |
| – | – | – | – | – | J | 1.77 +/- 0.02 | 96 +/- 1 |
| – | – | – | – | – | H | 1.14 +/- 0.02 | 95 +/- 1 |
| – | – | – | – | – | K | 0.76 +/- 0.04 | 98 +/- 2 |
| Cyg OB2 No.8A | 20 31 27.4 | +41 08 33 | 8.98 | O6 If | I | 1.20 +/- 0.04 | 79 +/- 2 |
| – | – | – | – | – | J | 0.78 +/- 0.02 | 81 +- 1 |
| – | – | – | – | – | H | 0.46 +/- 0.02 | 82 +/- 2 |
| – | – | – | – | – | K | 0.30 +/- 0.03 | 79 +/- 1 |
| Cyg OB2 No.9 | 20 31 23.0 | +41 04 51 | 10.8 | O5 If | I | 2.21 +/- 0.04 | 47 +/- 1 |
| – | – | – | – | – | J | 1.34 +/- 0.04 | 45 +/- 1 |
| – | – | – | – | – | H | 0.81 +/- 0.04 | 44 +/- 2 |
| – | – | – | – | – | K | 0.58 +/- 0.04 | 51 +/- 3 |
| Cyg OB2 No. 10 | 20 31 58.6 | +41 22 39 | 9.88 | O9.5 Ia | I | 0.39 +/- 0.04 | 47 +/- 4 |
| – | – | – | – | – | J | 0.15 +/- 0.04 | 50 +/- 2 |
| – | – | – | – | – | H | 0.13 +/- 0.03 | 34 +/- 8 |
| – | – | – | – | – | K | – | – |
| Cyg OB2 No. 11 | 20 32 21.2 | +41 26 39 | 10.04 | O5 If | I | 2.78 +/- 0.03 | 159 +/- 1 |
| – | – | – | – | – | J | 1.75 +/- 0.02 | 160 +/- 1 |
| – | – | – | – | – | H | 1.13 +/- 0.02 | 157 +/- 1 |
| – | – | – | – | – | K | 0.79 +/- 0.04 | 160 +/- 2 |
| Cyg Ob2 No. 12 | 20 3 0 53.2 | +41 04 14 | 11.47 | B5 Ia | I | 7.06 +/- 0.05 | 117 +/- 1 |
| – | – | – | – | – | J | 3.90 +/- 0.04 | 116 +/- 1 |
| – | – | – | – | – | H | 2.35 +/- 0.02 | 115 +/- 1 |
| – | – | – | – | – | K | 1.65 +/- 0.02 | 118 +/- 1 |
| Cyg OB2 No. 14 | 20 30 29.1 | +41 15 21 | 11.61 | OB | I | 2.63 +/- 0.04 | 88 +/- 1 |
| – | – | – | – | – | J | 1.54 +/- 0.02 | 88 +/- 1 |
| – | – | – | – | – | H | 0.96 +/- 0.03 | 87 +/- 1 |
| – | – | – | – | – | K | – | – |
| Cyg OB2 No. 15 | 20 30 40.1 | +41 16 00 | 11.28 | O8 | I | 2.61 +/- 0.06 | 85 +/- 1 |
| – | – | – | – | – | J | 1.43 +/- 0.06 | 85 +/- 1 |
| – | – | – | – | – | H | 0.96 +/- 0.03 | 87 +/- 1 |
| – | – | – | – | – | K | 0.74 +/- 0.25 | 85 +/- 3 |
| Cyg OB2 No. 17 | 20 31 28.1 | +41 09 59 | 11.75 | OB | I | 3.36 +/- 0.06 | 97 +/- 1 |
| – | – | – | – | – | J | 2.02 +/- 0.04 | 98 +/- 1 |
| – | – | – | – | – | H | 1.28 +/- 0.03 | 98 +/- 1 |
| – | – | – | – | – | K | – | – |
| Cyg OB2 No.18 | 20 31 43.0 | +41 05 05 | 11.09 | OB | I | 1.43 +/- 0.05 | 106 +/- 1 |
| – | – | – | – | – | J | 1.00 +/- 0.02 | 105 +/- 1 |
| – | – | – | – | – | H | 0.66 +/- 0.05 | 104 +/ 1 |
| – | – | – | – | – | K | 0.41 +/- 0.05 | 108 +/- 4 |
| Cyg OB2 No. 19 | 20 31 51.5 | +41 09 08 | 11.06 | B0 | I | 2.33 +/- 0.04 | 95 +/- 1 |
| – | – | – | – | – | J | 1.55 +/- 0.02 | 95 +/- 1 |
| – | – | – | – | – | H | 0.98 +/- 0.02 | 96 +/- 1 |
| – | – | – | – | – | K | 0.57 +/- 0.04 | 104 +/- 3 |
| Cyg OB2 No. 21 | 20 30 40.1 | +41 18 37 | 11.50 | B1 | I | 2.69+/- 0.07 | 54 +/- 1 |
| – | – | – | – | – | J | 1.74 +/- 0.05 | 55 +/- 1 |
| – | – | – | – | – | H | 1.28 +/- 0.08 | 56 +/- 2 |
| – | – | – | – | – | K | – | – |
| Cyg OB2 No. 22 | 20 31 21.1 | +41 03 00 | 11.68 | O5 | I | 1.58 +/- 0.05 | 0 +/- 1 |
| – | – | – | – | – | J | 1.02 +/- 0.02 | 2 +/- 1 |
| – | – | – | – | – | H | 0.66 +/- 0.02 | 2 +/- 1 |
| – | – | – | – | – | K | 0.42 +/- 004 | 7 +/- 2 |
| Cyg OB2 No. 24 | 20 31 29.7 | +41 06 52 | 11.98 | O7 | I | 2.13 +/- 0.05 | 62 +/- 1 |
| – | – | – | – | – | J | 1.36 +/- 0.03 | 63 +/- 1 |
| – | – | – | – | – | H | 0.89 +/- 0.03 | 65 +/- 2 |
| – | – | – | – | – | K | 0.43 +/- 0.16 | 84 +/- 13 |
| Cyg OB2 No. 25 | 20 31 38.3 | +41 23 06 | 11.88 | OB | I | 3.11 +/- 0.04 | 65 +/- 1 |
| – | – | – | – | – | J | 1.71 +/- 0.04 | 66 +/- 1 |
| – | – | – | – | – | H | 1.10 +/- 0.02 | 64 +/- 1 |
| – | – | – | – | – | K | 0.55 +/- 0.10 | 78 +/- 7 |
| NGC7380 HD215806 | 22 44 40.7 | +58 01 53 | 9.15 | B0Ia | I | 1.53 +/- 0.05 | 67 +/- 1 |
| – | – | – | – | – | J | 0.77 +/- 0.06 | 75 +/- 3 |
| – | – | – | – | – | H | 0.58 +/- 0.05 | 79 +/- 3 |
| – | – | – | – | – | K | 0.55 +/- 0.06 | 77 +/- 12 |
| BD +57-2615 | 22 45 48.1 | +57 52 47 | 10.24 | B3 | I | 1.71 +/- 0.05 | 41 +/- 1 |
| – | – | – | – | – | J | 0.73 +/- 0.10 | 30 +/- 3 |
| – | – | – | – | – | H | 0.72 | |
| – | – | – | – | – | K | – | – |
| BD +57-2617 | 22 46 08.9 | +57 46 35 | 10.2 | B8 | I | 0.83 +/- 0.07 | 59 +/- 3 |
| – | – | – | – | – | J | 0.51 +/- 0.03 | 60 +/- 1 |
| – | – | – | – | – | H | 0.26 +/- 0.06 | 41 +/- 7 |
| – | – | – | – | – | K | – | – |
| BD +57-22453 | 22 45 19.7 | +57 53 53 | 10.8 | OB | I | 1.39 +/- 0.08 | 70 +/- 2 |
| – | – | – | – | – | J | 0.73 +/- 0.07 | 71 +/- 3 |
| – | – | – | – | – | H | – | – |
| – | – | – | – | – | K | – | – |