Color composite thumbnail image of M33C-21386M33C-21386 (J013406.80+304727.0)


Target Notes

Color composite thumbnail image of M33C-21386

Classification: Of/late-WN

(Candidate LBV) Unresolved from LGGS star J013406.75+304727.3 of comparable brightness in all bands within 1 arcsecond. One additional unresolved LGGS star 2 magnitudes fainter within 1 arcsecond. Also a blend of two LGGS stars and a third in addition that are 1 magnitude fainter respectively 2 and 5 arcseconds away.

Find In Simbad Query LGGS Massey (2016) at VizieR Query CAT WISE (Eisenhardt et al., 2020) at VizieR Query Gaia DR3 (2022) at VizieR LBT Spectra @UMN
Query M33 Variability Hartman et al. Survey (2006) at VizieR

Photometry Table

Download table (txt) Key to Flags in Table Key For Images Plot/Graph Variability
MJDV*ImageB*ImageR*ImagesI*Images
56140.37 16.69± 0.05BM33C-21386 in filter V on MJD 56140.370
---- 16.44± 0.07BM33C-21386 in filter R on MJD 56140.370
----
56599.17 16.56± 0.05BM33C-21386 in filter V on MJD 56599.170
---- 16.49± 0.05BM33C-21386 in filter R on MJD 56599.170
----
56976.16 16.44± 0.04BM33C-21386 in filter V on MJD 56976.160
 16.42± 0.06BM33C-21386 in filter B on MJD 56976.160
 16.32± 0.05BM33C-21386 in filter R on MJD 56976.160
----
57038.13 16.64± 0.05BM33C-21386 in filter V on MJD 57038.130
 16.46± 0.05BM33C-21386 in filter B on MJD 57038.130
 16.27± 0.06BM33C-21386 in filter R on MJD 57038.130
----
57310.13 16.48± 0.05BM33C-21386 in filter V on MJD 57310.130
 16.56± 0.07BM33C-21386 in filter B on MJD 57310.130
 16.38± 0.05BM33C-21386 in filter R on MJD 57310.130
----
57335.18 16.50± 0.06BM33C-21386 in filter V on MJD 57335.180
---- 16.29± 0.05BM33C-21386 in filter R on MJD 57335.180
----
57634.34 16.57± 0.05BM33C-21386 in filter V on MJD 57634.340
 16.42± 0.07BM33C-21386 in filter B on MJD 57634.340
 16.36± 0.07XM33C-21386 in filter R on MJD 57634.340
 16.46± 0.06BM33C-21386 in filter I on MJD 57634.340
57638.35 16.71± 0.05BM33C-21386 in filter V on MJD 57638.350
 16.58± 0.06BM33C-21386 in filter B on MJD 57638.350
 16.41± 0.06BM33C-21386 in filter R on MJD 57638.350
 16.64± 0.08BM33C-21386 in filter I on MJD 57638.350
57687.13 16.58± 0.04BM33C-21386 in filter V on MJD 57687.130
 16.64± 0.06BM33C-21386 in filter B on MJD 57687.130
 16.43± 0.04BM33C-21386 in filter R on MJD 57687.130
 16.66± 0.07BM33C-21386 in filter I on MJD 57687.130
57964.37 16.67± 0.04BM33C-21386 in filter V on MJD 57964.370
 16.58± 0.06BM33C-21386 in filter B on MJD 57964.370
 16.39± 0.05BM33C-21386 in filter R on MJD 57964.370
 16.60± 0.06BM33C-21386 in filter I on MJD 57964.370
57988.40 16.52± 0.05TBM33C-21386 in filter V on MJD 57988.400
------------
58045.15 16.64± 0.04BM33C-21386 in filter V on MJD 58045.150
 16.67± 0.07BM33C-21386 in filter B on MJD 58045.150
 16.32± 0.05XM33C-21386 in filter R on MJD 58045.150
----
58073.18 16.68± 0.04BM33C-21386 in filter V on MJD 58073.180
 16.49± 0.06BM33C-21386 in filter B on MJD 58073.180
--------
58103.16 16.58± 0.04ABM33C-21386 in filter V on MJD 58103.160
M33C-21386 in filter V on MJD 58103.160
 16.42± 0.04BM33C-21386 in filter B on MJD 58103.160
---- 16.56± 0.07BM33C-21386 in filter I on MJD 58103.160
58108.14 16.56± 0.05BM33C-21386 in filter V on MJD 58108.140
 16.55± 0.06BM33C-21386 in filter B on MJD 58108.140
---- 16.51± 0.09BM33C-21386 in filter I on MJD 58108.140
58316.38 16.55± 0.03BM33C-21386 in filter V on MJD 58316.380
 16.62± 0.05BM33C-21386 in filter B on MJD 58316.380
 16.47± 0.04BM33C-21386 in filter R on MJD 58316.380
 16.52± 0.05BM33C-21386 in filter I on MJD 58316.380
58317.39 16.60± 0.05BM33C-21386 in filter V on MJD 58317.390
---- 16.36± 0.08BM33C-21386 in filter R on MJD 58317.390
M33C-21386 in filter R on MJD 58317.390
----
58341.40 16.58± 0.06BM33C-21386 in filter V on MJD 58341.400
 16.52± 0.09BM33C-21386 in filter B on MJD 58341.400
 16.30± 0.08BM33C-21386 in filter R on MJD 58341.400
 16.67± 0.10BM33C-21386 in filter I on MJD 58341.400
58342.36 16.59± 0.04BM33C-21386 in filter V on MJD 58342.360
 16.55± 0.06BM33C-21386 in filter B on MJD 58342.360
M33C-21386 in filter B on MJD 58342.360
 16.31± 0.05BM33C-21386 in filter R on MJD 58342.360
M33C-21386 in filter R on MJD 58342.360
 16.59± 0.06BM33C-21386 in filter I on MJD 58342.360
M33C-21386 in filter I on MJD 58342.360
58403.15 16.45± 0.04BM33C-21386 in filter V on MJD 58403.150
-------- 16.22± 0.09XM33C-21386 in filter I on MJD 58403.150
58420.06 16.73± 0.04BM33C-21386 in filter V on MJD 58420.060
 16.66± 0.06BM33C-21386 in filter B on MJD 58420.060
 16.45± 0.04BM33C-21386 in filter R on MJD 58420.060
 16.51± 0.07BM33C-21386 in filter I on MJD 58420.060
58433.00 16.49± 0.05BM33C-21386 in filter V on MJD 58433.000
---- 16.32± 0.06BM33C-21386 in filter R on MJD 58433.000
 16.45± 0.06BM33C-21386 in filter I on MJD 58433.000
58696.39 16.61± 0.05BM33C-21386 in filter V on MJD 58696.390
 16.49± 0.06BM33C-21386 in filter B on MJD 58696.390
 16.32± 0.07BM33C-21386 in filter R on MJD 58696.390
----
58779.15 16.79± 0.06BM33C-21386 in filter V on MJD 58779.150
---- 16.67± 0.07BM33C-21386 in filter R on MJD 58779.150
> 15.97XM33C-21386 in filter I on MJD 58779.150
58812.22 16.69± 0.05BM33C-21386 in filter V on MJD 58812.220
-------- 16.47± 0.06BM33C-21386 in filter I on MJD 58812.220
58902.06 16.55± 0.04ABM33C-21386 in filter V on MJD 58902.060
M33C-21386 in filter V on MJD 58902.060
---- 16.41± 0.05BM33C-21386 in filter R on MJD 58902.060
 16.46± 0.08BM33C-21386 in filter I on MJD 58902.060
59056.38 16.59± 0.05BM33C-21386 in filter V on MJD 59056.380
 16.52± 0.06BM33C-21386 in filter B on MJD 59056.380
 16.41± 0.06BM33C-21386 in filter R on MJD 59056.380
 16.57± 0.08BM33C-21386 in filter I on MJD 59056.380
59081.33 16.48± 0.05BM33C-21386 in filter V on MJD 59081.330
 16.59± 0.06BM33C-21386 in filter B on MJD 59081.330
 16.47± 0.05BM33C-21386 in filter R on MJD 59081.330
----
59082.35 16.68± 0.05BM33C-21386 in filter V on MJD 59082.350
 16.57± 0.07BM33C-21386 in filter B on MJD 59082.350
M33C-21386 in filter B on MJD 59082.350
 16.50± 0.07BM33C-21386 in filter R on MJD 59082.350
M33C-21386 in filter R on MJD 59082.350
----
59084.29-------- 16.36± 0.06TBM33C-21386 in filter R on MJD 59084.290
----
59161.09 16.75± 0.05BM33C-21386 in filter V on MJD 59161.090
 16.60± 0.05ABM33C-21386 in filter B on MJD 59161.090
M33C-21386 in filter B on MJD 59161.090
 16.51± 0.06ABM33C-21386 in filter R on MJD 59161.090
M33C-21386 in filter R on MJD 59161.090
----
59171.08 16.65± 0.05ABM33C-21386 in filter V on MJD 59171.080
M33C-21386 in filter V on MJD 59171.080
 16.60± 0.07BM33C-21386 in filter B on MJD 59171.080
 16.37± 0.06BM33C-21386 in filter R on MJD 59171.080
 16.50± 0.08ABM33C-21386 in filter I on MJD 59171.080
M33C-21386 in filter I on MJD 59171.080
59227.08 16.64± 0.04ABM33C-21386 in filter V on MJD 59227.080
M33C-21386 in filter V on MJD 59227.080
M33C-21386 in filter V on MJD 59227.080
 16.51± 0.05ABM33C-21386 in filter B on MJD 59227.080
M33C-21386 in filter B on MJD 59227.080
M33C-21386 in filter B on MJD 59227.080
 16.34± 0.07ABM33C-21386 in filter R on MJD 59227.080
M33C-21386 in filter R on MJD 59227.080
----
59415.36 16.62± 0.05BM33C-21386 in filter V on MJD 59415.360
---- 16.51± 0.06BM33C-21386 in filter R on MJD 59415.360
----
59441.40 16.48± 0.06ABM33C-21386 in filter V on MJD 59441.400
M33C-21386 in filter V on MJD 59441.400
 16.42± 0.07BM33C-21386 in filter B on MJD 59441.400
 16.49± 0.07BM33C-21386 in filter R on MJD 59441.400
 16.57± 0.08BM33C-21386 in filter I on MJD 59441.400
59463.28 16.60± 0.05ABM33C-21386 in filter V on MJD 59463.280
M33C-21386 in filter V on MJD 59463.280
M33C-21386 in filter V on MJD 59463.280
 16.63± 0.06BM33C-21386 in filter B on MJD 59463.280
---- 16.62± 0.06BM33C-21386 in filter I on MJD 59463.280
59523.16 16.64± 0.04ABM33C-21386 in filter V on MJD 59523.160
M33C-21386 in filter V on MJD 59523.160
 16.71± 0.04BM33C-21386 in filter B on MJD 59523.160
 16.46± 0.05BM33C-21386 in filter R on MJD 59523.160
----
59525.15 16.73± 0.04ABM33C-21386 in filter V on MJD 59525.150
M33C-21386 in filter V on MJD 59525.150
M33C-21386 in filter V on MJD 59525.150
 16.61± 0.05BM33C-21386 in filter B on MJD 59525.150
 16.38± 0.06BM33C-21386 in filter R on MJD 59525.150
 16.49± 0.09BM33C-21386 in filter I on MJD 59525.150
59546.18 16.65± 0.05ABM33C-21386 in filter V on MJD 59546.180
M33C-21386 in filter V on MJD 59546.180
 16.43± 0.07BM33C-21386 in filter B on MJD 59546.180
---- 16.57± 0.06BM33C-21386 in filter I on MJD 59546.180
59551.10 16.72± 0.05ABM33C-21386 in filter V on MJD 59551.100
M33C-21386 in filter V on MJD 59551.100
 16.63± 0.06BM33C-21386 in filter B on MJD 59551.100
---- 16.52± 0.09BM33C-21386 in filter I on MJD 59551.100
59583.16 16.64± 0.05ABM33C-21386 in filter V on MJD 59583.160
M33C-21386 in filter V on MJD 59583.160
 16.55± 0.07BM33C-21386 in filter B on MJD 59583.160
 16.43± 0.06BM33C-21386 in filter R on MJD 59583.160
----
59608.09 16.64± 0.05ABM33C-21386 in filter V on MJD 59608.090
M33C-21386 in filter V on MJD 59608.090
---- 16.38± 0.06BM33C-21386 in filter R on MJD 59608.090
 16.46± 0.06BM33C-21386 in filter I on MJD 59608.090
59794.34 16.56± 0.05ABM33C-21386 in filter V on MJD 59794.340
M33C-21386 in filter V on MJD 59794.340
 16.59± 0.06BM33C-21386 in filter B on MJD 59794.340
--------
59823.24 16.69± 0.05BM33C-21386 in filter V on MJD 59823.240
 16.58± 0.05BM33C-21386 in filter B on MJD 59823.240
--------
59849.18 16.69± 0.05ABM33C-21386 in filter V on MJD 59849.180
M33C-21386 in filter V on MJD 59849.180
---- 16.24± 0.05BM33C-21386 in filter R on MJD 59849.180
 16.78± 0.10BM33C-21386 in filter I on MJD 59849.180
59851.15 16.70± 0.04ABM33C-21386 in filter V on MJD 59851.150
M33C-21386 in filter V on MJD 59851.150
M33C-21386 in filter V on MJD 59851.150
---- 16.42± 0.05ABM33C-21386 in filter R on MJD 59851.150
M33C-21386 in filter R on MJD 59851.150
 16.56± 0.08BM33C-21386 in filter I on MJD 59851.150
59854.20 16.68± 0.04ABM33C-21386 in filter V on MJD 59854.200
M33C-21386 in filter V on MJD 59854.200
M33C-21386 in filter V on MJD 59854.200
 16.53± 0.05ABM33C-21386 in filter B on MJD 59854.200
M33C-21386 in filter B on MJD 59854.200
M33C-21386 in filter B on MJD 59854.200
 16.39± 0.06BM33C-21386 in filter R on MJD 59854.200
----
59879.12 16.63± 0.05BM33C-21386 in filter V on MJD 59879.120
-------- 16.52± 0.07ABM33C-21386 in filter I on MJD 59879.120
M33C-21386 in filter I on MJD 59879.120
59903.18 16.71± 0.04BM33C-21386 in filter V on MJD 59903.180
 16.59± 0.06BM33C-21386 in filter B on MJD 59903.180
 16.44± 0.06BM33C-21386 in filter R on MJD 59903.180
 16.57± 0.08BM33C-21386 in filter I on MJD 59903.180
59904.12 16.68± 0.04BM33C-21386 in filter V on MJD 59904.120
 16.59± 0.05BM33C-21386 in filter B on MJD 59904.120
M33C-21386 in filter B on MJD 59904.120
 16.40± 0.05BM33C-21386 in filter R on MJD 59904.120
M33C-21386 in filter R on MJD 59904.120
 16.53± 0.07BM33C-21386 in filter I on MJD 59904.120
M33C-21386 in filter I on MJD 59904.120
59932.15 16.57± 0.06ABM33C-21386 in filter V on MJD 59932.150
M33C-21386 in filter V on MJD 59932.150
M33C-21386 in filter V on MJD 59932.150
 16.50± 0.08BM33C-21386 in filter B on MJD 59932.150
 16.45± 0.07BM33C-21386 in filter R on MJD 59932.150
 16.63± 0.09BM33C-21386 in filter I on MJD 59932.150
60172.37 16.50± 0.06BM33C-21386 in filter V on MJD 60172.370
 16.47± 0.06BM33C-21386 in filter B on MJD 60172.370
--------
60205.16 16.75± 0.05ABM33C-21386 in filter V on MJD 60205.160
M33C-21386 in filter V on MJD 60205.160
 16.75± 0.04BM33C-21386 in filter B on MJD 60205.160
 16.04± 0.07BM33C-21386 in filter R on MJD 60205.160
----
60227.11 16.68± 0.05ABM33C-21386 in filter V on MJD 60227.110
M33C-21386 in filter V on MJD 60227.110
M33C-21386 in filter V on MJD 60227.110
 16.54± 0.07BM33C-21386 in filter B on MJD 60227.110
 16.38± 0.06BM33C-21386 in filter R on MJD 60227.110
 16.59± 0.08ABM33C-21386 in filter I on MJD 60227.110
M33C-21386 in filter I on MJD 60227.110
60227.11 16.68± 0.05ABM33C-21386 in filter V on MJD 60227.110
M33C-21386 in filter V on MJD 60227.110
M33C-21386 in filter V on MJD 60227.110
 16.54± 0.07BM33C-21386 in filter B on MJD 60227.110
 16.38± 0.06BM33C-21386 in filter R on MJD 60227.110
 16.59± 0.08ABM33C-21386 in filter I on MJD 60227.110
M33C-21386 in filter I on MJD 60227.110
60261.12 16.60± 0.04BM33C-21386 in filter V on MJD 60261.120
---- 16.28± 0.06BM33C-21386 in filter R on MJD 60261.120
----
60262.14 16.64± 0.04ABM33C-21386 in filter V on MJD 60262.140
M33C-21386 in filter V on MJD 60262.140
 16.56± 0.04ABM33C-21386 in filter B on MJD 60262.140
M33C-21386 in filter B on MJD 60262.140
 16.43± 0.05BM33C-21386 in filter R on MJD 60262.140
M33C-21386 in filter R on MJD 60262.140
 16.48± 0.09BM33C-21386 in filter I on MJD 60262.140
60290.15 16.69± 0.04ABM33C-21386 in filter V on MJD 60290.150
M33C-21386 in filter V on MJD 60290.150
M33C-21386 in filter V on MJD 60290.150
 16.60± 0.05ABM33C-21386 in filter B on MJD 60290.150
M33C-21386 in filter B on MJD 60290.150
M33C-21386 in filter B on MJD 60290.150
 16.54± 0.07BM33C-21386 in filter R on MJD 60290.150
 16.50± 0.08ABM33C-21386 in filter I on MJD 60290.150
M33C-21386 in filter I on MJD 60290.150
60292.18 16.53± 0.04ABM33C-21386 in filter V on MJD 60292.180
M33C-21386 in filter V on MJD 60292.180
M33C-21386 in filter V on MJD 60292.180
---- 16.37± 0.06AM33C-21386 in filter R on MJD 60292.180
M33C-21386 in filter R on MJD 60292.180
 16.37± 0.08BM33C-21386 in filter I on MJD 60292.180
60342.09 16.64± 0.06ABM33C-21386 in filter V on MJD 60342.090
M33C-21386 in filter V on MJD 60342.090
---- 16.47± 0.07BM33C-21386 in filter R on MJD 60342.090
 16.64± 0.08BM33C-21386 in filter I on MJD 60342.090
60504.38 16.61± 0.05BM33C-21386 in filter V on MJD 60504.380
 16.54± 0.06BM33C-21386 in filter B on MJD 60504.380
 16.44± 0.07BM33C-21386 in filter R on MJD 60504.380
----
60506.37 16.75± 0.04ABM33C-21386 in filter V on MJD 60506.370
M33C-21386 in filter V on MJD 60506.370
 16.71± 0.03BM33C-21386 in filter B on MJD 60506.370
 16.45± 0.05BM33C-21386 in filter R on MJD 60506.370
 16.54± 0.08BM33C-21386 in filter I on MJD 60506.370
60529.37 16.50± 0.06ABM33C-21386 in filter V on MJD 60529.370
M33C-21386 in filter V on MJD 60529.370
 16.42± 0.07BM33C-21386 in filter B on MJD 60529.370
---- 16.57± 0.07BM33C-21386 in filter I on MJD 60529.370
60533.38 16.61± 0.04BM33C-21386 in filter V on MJD 60533.380
---- 16.45± 0.06BM33C-21386 in filter R on MJD 60533.380
 16.58± 0.09BM33C-21386 in filter I on MJD 60533.380
60556.27 16.61± 0.05ABM33C-21386 in filter V on MJD 60556.270
M33C-21386 in filter V on MJD 60556.270
M33C-21386 in filter V on MJD 60556.270
 16.61± 0.04ABM33C-21386 in filter B on MJD 60556.270
M33C-21386 in filter B on MJD 60556.270
 16.46± 0.06BM33C-21386 in filter R on MJD 60556.270
 16.48± 0.08BM33C-21386 in filter I on MJD 60556.270
60564.22 16.76± 0.04BM33C-21386 in filter V on MJD 60564.220
 16.59± 0.07BM33C-21386 in filter B on MJD 60564.220
 16.48± 0.06BM33C-21386 in filter R on MJD 60564.220
----
60594.11 16.63± 0.04AB---- 16.42± 0.06B 16.51± 0.08AB
60595.13 16.65± 0.04BM33C-21386 in filter V on MJD 60595.130
 16.52± 0.07BM33C-21386 in filter B on MJD 60595.130
 16.42± 0.06BM33C-21386 in filter R on MJD 60595.130
M33C-21386 in filter R on MJD 60595.130
----
60612.14 16.72± 0.05BM33C-21386 in filter V on MJD 60612.140
---- 16.44± 0.06BM33C-21386 in filter R on MJD 60612.140
----
60651.16 16.64± 0.04ABM33C-21386 in filter V on MJD 60651.160
M33C-21386 in filter V on MJD 60651.160
M33C-21386 in filter V on MJD 60651.160
 16.61± 0.06BM33C-21386 in filter B on MJD 60651.160
 16.43± 0.06BM33C-21386 in filter R on MJD 60651.160
 16.53± 0.09BM33C-21386 in filter I on MJD 60651.160
Download table (txt) Key to Flags in Table Key For Images Plot/Graph Variability

Plots of Brightness and Color

Key for Plot Variability Photometry Table Target Notes

Plot of photometry for M33C-21386Plot of color for M33C-21386

Key for Plot Variability Photometry Table Target Notes

Variability

Plot/Graph Photometry Table Target Notes

From the data available in this survey, it is not possible to tell with certainty if this star is variable.

Correlation factors between bands

If the brightness variation is true variability then there should be a correlation between brightness changes recorded in different filter bands. The following table are the R-squared linear correlation factors calculated for the pairs of bands. The number in parentheses next to the R-squared value is the number of elements used to calculate the correlation factor. The number in square brackets next to the band is the range of magnitudes measured.

V [0.34 mag]B [0.33 mag]R [0.63 mag]
B [0.33 mag]0.28 (48)
R [0.63 mag]0.02 (53)0.00 (36)
I [0.41 mag]0.01 (39)0.02 (28)0.07 (30)

Magnitude-Magnitude Plots

The plots below are provided to check the values in the table above and also to show any non-linear correlations

Plot to assess correlation between bands for M33C-21386

Plot to assess correlation between bands for M33C-21386

Plot/Graph Photometry Table Target Notes

I & R Statistics

Welch & Stetson (1993, AJ, 105, 1813) present a method for varible star detection in CCD images from automated surveys. Data from two bands are compared and two statistics are calculated: R and I.

The I-statistic has an expectation value of zero for stars that are NOT variable. A larger non-zero I-value indicates a higher likelihood that the star is variable. The R statistic indicates how the color of the star changes as the variable grows brighter with R = 1.0 being no change in color.

R and I values have only been calculated if there are more than four (4) matched measurements of brightness in each band.
V
(I|R)		B
(I|R)		R
(I|R)
B
(I|R)		1.39 | 0.84
R
(I|R)		0.37 | 1.230.63 | 0.31
I
(I|R)		0.18 | 1.62-0.10 | 1.70-0.26 | 0.99

Back to catalog index

By John C. Martin, University of Illinois Springfield Henry R. Barber Research Observatory

Generated on 2025-08-04 15:53:14 UT-5