AAVSO: American Association of Variable Star Observers

Variable Star Plotter

Field photometry for IR Com from the AAVSO Variable Star Database

Data includes all comparison stars within 0.5° of RA: 12:39:32.13 [189.88387°] & Dec: 21:08:06.4 [21.13511°]

Report this sequence as X24817CLV in the chart field of your observation report.

AUID RA Dec Label V B-V Comments
000-BBT-078 12:39:07.31 [189.78045654°] 21:03:45.2 [21.06255531°] 55 5.460 (0.100)22 0.960 (0.173)
000-BBT-115 12:40:17.07 [190.07112122°] 21:31:11.5 [21.51986122°] 80 7.962 (0.008)17 0.541 (0.039)
000-BBT-084 12:39:15.77 [189.81570435°] 21:01:44.1 [21.02891731°] 91 9.105 (0.013)17 0.546 (0.048)
000-BBT-080 12:39:09.75 [189.7906189°] 21:15:48.5 [21.2634716°] 104 10.356 (0.018)17 0.450 (0.076)
000-BBT-109 12:39:59.75 [189.9989624°] 21:07:22.9 [21.1230278°] 125 12.500 (0.100)23 0.627 (0.172)
000-BBT-104 12:39:53.68 [189.97366333°] 21:04:13.3 [21.07036018°] 135 13.517 (0.023)10 0.662 (0.035)
000-BBT-105 12:39:54.41 [189.97671509°] 21:06:55.9 [21.11552811°] 138 13.764 (0.011)10 1.161 (0.018)
000-BBT-107 12:39:55.25 [189.98020935°] 21:07:28.1 [21.12447166°] 143 14.314 (0.011)10 1.403 (0.019)
  • AUID is the AAVSO Unique Identifier for the star. When reporting a problem, please include this AUID.
  • Coordinates are in J2000 sexagesimal format, followed by decimal degrees
  • Search for variable stars in this field via VSX
  • Label is that star's label when plotted on an AAVSO chart, usually (but not always) its V magnitude rounded to the nearest tenth.

Source Reference Table

Footnote Source Footnote Source Footnote Source
1 Tycho-2 17 ASAS 33 SRO50
2 GSC 1.2 18 SRO 34 K35
3 GSC 2.2 19 NA 35 Landolt2007
4 USNO A2.0 20 GCPD 36 Landolt2009
5 USNO B1.0 21 SDSS 37 BSM_S
6 GCVS 4.2 22 BSC 38 UCAC3
7 UCAC2 23 LONEOS 39 UCAC4
8 2MASS 24 WBVR 40 BSM-Hamren
9 AAVSO Charts 25 DENIS 41 BSM_Berry
10 CCD Henden 26 CMC14 42 TMO61
11 Downes 27 RRLyr 43 VSX
12 Hipparcos 28 BSM_NM 44 COKER30
13 HD 29 APASS 45 BSM_HQ
14 NSV 30 W28 46 Pan-STARRS
15 ACP 0.9 31 W30 47 Landolt2013
16 TASS 32 OC61 48 GAIA DR2