Color composite thumbnail image of M33C-19725M33C-19725 (J013339.52+304540.5)


Target Notes

Color composite thumbnail image of M33C-19725

Classification: OB-Supergiant

No blend concerns

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
56140.39 17.30± 0.04-M33C-19725 in filter V on MJD 56140.390
---- 17.15± 0.11-M33C-19725 in filter R on MJD 56140.390
----
56593.16 17.27± 0.03-M33C-19725 in filter V on MJD 56593.160
 17.37± 0.03-M33C-19725 in filter B on MJD 56593.160
--------
56599.18 17.18± 0.04AM33C-19725 in filter V on MJD 56599.180
M33C-19725 in filter V on MJD 56599.180
 17.20± 0.05AM33C-19725 in filter B on MJD 56599.180
M33C-19725 in filter B on MJD 56599.180
 16.89± 0.06AM33C-19725 in filter R on MJD 56599.180
M33C-19725 in filter R on MJD 56599.180
----
56976.19 17.00± 0.04-M33C-19725 in filter V on MJD 56976.190
 17.10± 0.04-M33C-19725 in filter B on MJD 56976.190
 16.77± 0.07-M33C-19725 in filter R on MJD 56976.190
----
57328.16 17.14± 0.03-M33C-19725 in filter V on MJD 57328.160
 17.20± 0.04-M33C-19725 in filter B on MJD 57328.160
 16.91± 0.04-M33C-19725 in filter R on MJD 57328.160
----
57634.36 17.54± 0.04AM33C-19725 in filter V on MJD 57634.360
M33C-19725 in filter V on MJD 57634.360
 17.55± 0.06AM33C-19725 in filter B on MJD 57634.360
M33C-19725 in filter B on MJD 57634.360
 17.27± 0.06AM33C-19725 in filter R on MJD 57634.360
M33C-19725 in filter R on MJD 57634.360
 17.28± 0.07AM33C-19725 in filter I on MJD 57634.360
M33C-19725 in filter I on MJD 57634.360
57687.13 17.27± 0.04-M33C-19725 in filter V on MJD 57687.130
 17.30± 0.06-M33C-19725 in filter B on MJD 57687.130
 17.03± 0.04-M33C-19725 in filter R on MJD 57687.130
 17.01± 0.07-M33C-19725 in filter I on MJD 57687.130
57964.37 17.57± 0.04-M33C-19725 in filter V on MJD 57964.370
 17.61± 0.06-M33C-19725 in filter B on MJD 57964.370
 17.31± 0.04-M33C-19725 in filter R on MJD 57964.370
 17.32± 0.06-M33C-19725 in filter I on MJD 57964.370
57988.41 17.20± 0.04-M33C-19725 in filter V on MJD 57988.410
 17.25± 0.04-M33C-19725 in filter B on MJD 57988.410
--------
58043.10 17.36± 0.04-M33C-19725 in filter V on MJD 58043.100
---- 17.11± 0.04-M33C-19725 in filter R on MJD 58043.100
 17.11± 0.07-M33C-19725 in filter I on MJD 58043.100
58045.15 17.39± 0.04-M33C-19725 in filter V on MJD 58045.150
 17.41± 0.07-M33C-19725 in filter B on MJD 58045.150
 17.14± 0.04-M33C-19725 in filter R on MJD 58045.150
----
58073.18 17.25± 0.04-M33C-19725 in filter V on MJD 58073.180
 17.21± 0.06-M33C-19725 in filter B on MJD 58073.180
--------
58103.16 17.09± 0.04AM33C-19725 in filter V on MJD 58103.160
M33C-19725 in filter V on MJD 58103.160
 17.17± 0.04-M33C-19725 in filter B on MJD 58103.160
---- 16.81± 0.06-M33C-19725 in filter I on MJD 58103.160
58108.14 17.29± 0.05-M33C-19725 in filter V on MJD 58108.140
 17.38± 0.06-M33C-19725 in filter B on MJD 58108.140
---- 17.06± 0.08-M33C-19725 in filter I on MJD 58108.140
58317.39 17.21± 0.04-M33C-19725 in filter V on MJD 58317.390
---- 17.00± 0.07-M33C-19725 in filter R on MJD 58317.390
----
58341.40 17.41± 0.05-M33C-19725 in filter V on MJD 58341.400
 17.44± 0.08-M33C-19725 in filter B on MJD 58341.400
 17.20± 0.07-M33C-19725 in filter R on MJD 58341.400
 17.24± 0.10-M33C-19725 in filter I on MJD 58341.400
58342.36 17.40± 0.04-M33C-19725 in filter V on MJD 58342.360
 17.49± 0.06-M33C-19725 in filter B on MJD 58342.360
M33C-19725 in filter B on MJD 58342.360
 17.21± 0.04-M33C-19725 in filter R on MJD 58342.360
M33C-19725 in filter R on MJD 58342.360
 17.11± 0.06-M33C-19725 in filter I on MJD 58342.360
M33C-19725 in filter I on MJD 58342.360
58403.15 17.17± 0.04-M33C-19725 in filter V on MJD 58403.150
-------- 16.85± 0.09-M33C-19725 in filter I on MJD 58403.150
58420.06 17.17± 0.04-M33C-19725 in filter V on MJD 58420.060
 17.17± 0.06-M33C-19725 in filter B on MJD 58420.060
 16.90± 0.04-M33C-19725 in filter R on MJD 58420.060
 16.89± 0.07-M33C-19725 in filter I on MJD 58420.060
58673.38 17.40± 0.03-M33C-19725 in filter V on MJD 58673.380
 17.50± 0.04-M33C-19725 in filter B on MJD 58673.380
--------
58696.39 17.08± 0.04-M33C-19725 in filter V on MJD 58696.390
 17.09± 0.06-M33C-19725 in filter B on MJD 58696.390
 16.90± 0.04-M33C-19725 in filter R on MJD 58696.390
----
58750.19 17.15± 0.03-M33C-19725 in filter V on MJD 58750.190
---- 16.90± 0.05-M33C-19725 in filter R on MJD 58750.190
----
58779.15 17.11± 0.04-M33C-19725 in filter V on MJD 58779.150
---- 16.89± 0.05-M33C-19725 in filter R on MJD 58779.150
 16.88± 0.08-M33C-19725 in filter I on MJD 58779.150
58902.05 17.23± 0.03-M33C-19725 in filter V on MJD 58902.050
-------- 17.04± 0.08-M33C-19725 in filter I on MJD 58902.050
59056.38 17.69± 0.05-M33C-19725 in filter V on MJD 59056.380
 17.79± 0.06-M33C-19725 in filter B on MJD 59056.380
 17.38± 0.05-M33C-19725 in filter R on MJD 59056.380
 17.38± 0.08-M33C-19725 in filter I on MJD 59056.380
59082.34 17.11± 0.03AM33C-19725 in filter V on MJD 59082.340
M33C-19725 in filter V on MJD 59082.340
 17.16± 0.05AM33C-19725 in filter B on MJD 59082.340
M33C-19725 in filter B on MJD 59082.340
 16.91± 0.05AM33C-19725 in filter R on MJD 59082.340
M33C-19725 in filter R on MJD 59082.340
----
59084.29-------- 16.85± 0.05TM33C-19725 in filter R on MJD 59084.290
----
59161.11 17.08± 0.03-M33C-19725 in filter V on MJD 59161.110
 17.18± 0.03-M33C-19725 in filter B on MJD 59161.110
 16.86± 0.04-M33C-19725 in filter R on MJD 59161.110
----
59171.09 17.38± 0.04AM33C-19725 in filter V on MJD 59171.090
M33C-19725 in filter V on MJD 59171.090
 17.41± 0.05AM33C-19725 in filter B on MJD 59171.090
M33C-19725 in filter B on MJD 59171.090
 17.11± 0.05-M33C-19725 in filter R on MJD 59171.090
 17.13± 0.08AM33C-19725 in filter I on MJD 59171.090
M33C-19725 in filter I on MJD 59171.090
59227.08 17.08± 0.03AM33C-19725 in filter V on MJD 59227.080
M33C-19725 in filter V on MJD 59227.080
 17.10± 0.04AM33C-19725 in filter B on MJD 59227.080
M33C-19725 in filter B on MJD 59227.080
 16.86± 0.05-M33C-19725 in filter R on MJD 59227.080
----
59415.38 17.17± 0.03-M33C-19725 in filter V on MJD 59415.380
 17.23± 0.03-M33C-19725 in filter B on MJD 59415.380
--------
59441.41 17.23± 0.04-M33C-19725 in filter V on MJD 59441.410
---- 17.04± 0.05-M33C-19725 in filter R on MJD 59441.410
 16.96± 0.07-M33C-19725 in filter I on MJD 59441.410
59442.39 17.25± 0.02-M33C-19725 in filter V on MJD 59442.390
---- 17.01± 0.05-M33C-19725 in filter R on MJD 59442.390
M33C-19725 in filter R on MJD 59442.390
 17.04± 0.08-M33C-19725 in filter I on MJD 59442.390
M33C-19725 in filter I on MJD 59442.390
59463.27 17.10± 0.04-M33C-19725 in filter V on MJD 59463.270
 17.15± 0.06-M33C-19725 in filter B on MJD 59463.270
--------
59523.17 17.13± 0.02-M33C-19725 in filter V on MJD 59523.170
 17.18± 0.02-M33C-19725 in filter B on MJD 59523.170
--------
59525.15 17.02± 0.03AM33C-19725 in filter V on MJD 59525.150
M33C-19725 in filter V on MJD 59525.150
---- 16.79± 0.05-M33C-19725 in filter R on MJD 59525.150
 16.73± 0.09-M33C-19725 in filter I on MJD 59525.150
59546.19 17.05± 0.03AM33C-19725 in filter V on MJD 59546.190
M33C-19725 in filter V on MJD 59546.190
 17.05± 0.06-M33C-19725 in filter B on MJD 59546.190
 16.84± 0.04-M33C-19725 in filter R on MJD 59546.190
----
59551.12 17.48± 0.03AM33C-19725 in filter V on MJD 59551.120
M33C-19725 in filter V on MJD 59551.120
 17.58± 0.03-M33C-19725 in filter B on MJD 59551.120
---- 17.18± 0.08-M33C-19725 in filter I on MJD 59551.120
59583.17 17.28± 0.03AM33C-19725 in filter V on MJD 59583.170
M33C-19725 in filter V on MJD 59583.170
 17.33± 0.06-M33C-19725 in filter B on MJD 59583.170
---- 16.94± 0.08-M33C-19725 in filter I on MJD 59583.170
59608.11 17.21± 0.04AM33C-19725 in filter V on MJD 59608.110
M33C-19725 in filter V on MJD 59608.110
---- 16.96± 0.05AM33C-19725 in filter R on MJD 59608.110
M33C-19725 in filter R on MJD 59608.110
----
59794.37 17.10± 0.04AM33C-19725 in filter V on MJD 59794.370
M33C-19725 in filter V on MJD 59794.370
 17.19± 0.05AM33C-19725 in filter B on MJD 59794.370
M33C-19725 in filter B on MJD 59794.370
--------
59849.18 17.44± 0.04AM33C-19725 in filter V on MJD 59849.180
M33C-19725 in filter V on MJD 59849.180
---- 17.12± 0.05-M33C-19725 in filter R on MJD 59849.180
 17.04± 0.08-M33C-19725 in filter I on MJD 59849.180
59851.16 17.50± 0.04AM33C-19725 in filter V on MJD 59851.160
M33C-19725 in filter V on MJD 59851.160
---- 17.22± 0.06-M33C-19725 in filter R on MJD 59851.160
 17.27± 0.08-M33C-19725 in filter I on MJD 59851.160
59854.19 17.18± 0.04AM33C-19725 in filter V on MJD 59854.190
M33C-19725 in filter V on MJD 59854.190
 17.23± 0.05AM33C-19725 in filter B on MJD 59854.190
M33C-19725 in filter B on MJD 59854.190
 16.92± 0.05-M33C-19725 in filter R on MJD 59854.190
----
59879.15 17.14± 0.04-M33C-19725 in filter V on MJD 59879.150
 17.14± 0.03-M33C-19725 in filter B on MJD 59879.150
--------
59903.20 17.31± 0.03AM33C-19725 in filter V on MJD 59903.200
M33C-19725 in filter V on MJD 59903.200
 17.37± 0.04AM33C-19725 in filter B on MJD 59903.200
M33C-19725 in filter B on MJD 59903.200
 17.07± 0.05AM33C-19725 in filter R on MJD 59903.200
M33C-19725 in filter R on MJD 59903.200
 17.04± 0.08AM33C-19725 in filter I on MJD 59903.200
M33C-19725 in filter I on MJD 59903.200
59932.16 17.39± 0.04AM33C-19725 in filter V on MJD 59932.160
M33C-19725 in filter V on MJD 59932.160
 17.38± 0.08-M33C-19725 in filter B on MJD 59932.160
---- 17.19± 0.09-M33C-19725 in filter I on MJD 59932.160
60172.39 17.21± 0.02-M33C-19725 in filter V on MJD 60172.390
---- 16.99± 0.04-M33C-19725 in filter R on MJD 60172.390
----
60205.17 17.17± 0.03-M33C-19725 in filter V on MJD 60205.170
 17.27± 0.03-M33C-19725 in filter B on MJD 60205.170
--------
60227.11 17.28± 0.04AM33C-19725 in filter V on MJD 60227.110
M33C-19725 in filter V on MJD 60227.110
 17.31± 0.07-M33C-19725 in filter B on MJD 60227.110
 17.01± 0.05-M33C-19725 in filter R on MJD 60227.110
 16.95± 0.09-M33C-19725 in filter I on MJD 60227.110
60261.12 17.36± 0.03-M33C-19725 in filter V on MJD 60261.120
---- 17.16± 0.05-M33C-19725 in filter R on MJD 60261.120
----
60262.16 17.41± 0.03-M33C-19725 in filter V on MJD 60262.160
 17.47± 0.03-M33C-19725 in filter B on MJD 60262.160
---- 17.11± 0.09-M33C-19725 in filter I on MJD 60262.160
60290.15 17.15± 0.03AM33C-19725 in filter V on MJD 60290.150
M33C-19725 in filter V on MJD 60290.150
 17.18± 0.05AM33C-19725 in filter B on MJD 60290.150
M33C-19725 in filter B on MJD 60290.150
 16.90± 0.05-M33C-19725 in filter R on MJD 60290.150
 16.93± 0.09-M33C-19725 in filter I on MJD 60290.150
60292.18 17.27± 0.03AM33C-19725 in filter V on MJD 60292.180
M33C-19725 in filter V on MJD 60292.180
---- 17.07± 0.06-M33C-19725 in filter R on MJD 60292.180
 17.06± 0.08-M33C-19725 in filter I on MJD 60292.180
60342.10 17.11± 0.03AM33C-19725 in filter V on MJD 60342.100
M33C-19725 in filter V on MJD 60342.100
 17.21± 0.03-M33C-19725 in filter B on MJD 60342.100
---- 16.88± 0.07-M33C-19725 in filter I on MJD 60342.100
60506.37 17.13± 0.04AM33C-19725 in filter V on MJD 60506.370
M33C-19725 in filter V on MJD 60506.370
 17.25± 0.03-M33C-19725 in filter B on MJD 60506.370
 16.91± 0.04-M33C-19725 in filter R on MJD 60506.370
 16.85± 0.07-M33C-19725 in filter I on MJD 60506.370
60529.38 17.38± 0.04-M33C-19725 in filter V on MJD 60529.380
 17.41± 0.06-M33C-19725 in filter B on MJD 60529.380
--------
60533.38 17.32± 0.03-M33C-19725 in filter V on MJD 60533.380
---- 17.12± 0.05-M33C-19725 in filter R on MJD 60533.380
 17.11± 0.08-M33C-19725 in filter I on MJD 60533.380
60556.29 17.16± 0.03AM33C-19725 in filter V on MJD 60556.290
M33C-19725 in filter V on MJD 60556.290
 17.25± 0.02-M33C-19725 in filter B on MJD 60556.290
---- 16.88± 0.07-M33C-19725 in filter I on MJD 60556.290
60564.22 17.34± 0.04-M33C-19725 in filter V on MJD 60564.220
 17.36± 0.07-M33C-19725 in filter B on MJD 60564.220
 17.12± 0.05-M33C-19725 in filter R on MJD 60564.220
----
60594.12 17.40± 0.03----- 17.19± 0.06- 17.18± 0.09-
60595.13 17.35± 0.04-M33C-19725 in filter V on MJD 60595.130
 17.40± 0.07-M33C-19725 in filter B on MJD 60595.130
 17.11± 0.05-M33C-19725 in filter R on MJD 60595.130
M33C-19725 in filter R on MJD 60595.130
----
60612.16 17.66± 0.03-M33C-19725 in filter V on MJD 60612.160
 17.69± 0.02-M33C-19725 in filter B on MJD 60612.160
--------
60651.17 17.09± 0.03AM33C-19725 in filter V on MJD 60651.170
M33C-19725 in filter V on MJD 60651.170
---- 16.89± 0.05-M33C-19725 in filter R on MJD 60651.170
 16.90± 0.09-M33C-19725 in filter I on MJD 60651.170
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-19725Plot of color for M33C-19725

Key for Plot Variability Photometry Table Target Notes

Variability

Plot/Graph Photometry Table Target Notes

It is very likely that 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 [0.69 mag]B [0.73 mag]R [0.60 mag]
B [0.73 mag]0.95 (44)
R [0.60 mag]0.95 (41)0.94 (24)
I [0.64 mag]0.90 (33)0.85 (20)0.94 (23)

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-19725

Plot to assess correlation between bands for M33C-19725

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)		19.61 | 0.86
R
(I|R)		12.18 | 1.428.76 | 0.52
I
(I|R)		8.05 | 2.107.34 | 1.566.25 | 1.46

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