Open a color composite thumbnail image of M33-013424.78M33-013424.78 (J013424.78+303306.6)


Target Notes

Open a color composite thumbnail image of M33-013424.78

Classification: OB-Supergiant

(Candidate LBV) 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
56140.37 17.05± 0.05-Open a thumbnail image of M33-013424.78 in filter V on MJD 56140.370
---- 16.86± 0.08-Open a thumnail image of M33-013424.78 in filter R on MJD 56140.370
----
56599.17 16.94± 0.05-Open a thumbnail image of M33-013424.78 in filter V on MJD 56599.170
 17.02± 0.06-Open a thumnail image of M33-013424.78 in filter B on MJD 56599.170
 16.75± 0.05-Open a thumnail image of M33-013424.78 in filter R on MJD 56599.170
----
56976.16 17.01± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 56976.160
 17.13± 0.06-Open a thumnail image of M33-013424.78 in filter B on MJD 56976.160
 16.84± 0.05-Open a thumnail image of M33-013424.78 in filter R on MJD 56976.160
----
56982.22 16.99± 0.06-Open a thumbnail image of M33-013424.78 in filter V on MJD 56982.220
 17.08± 0.06-Open a thumnail image of M33-013424.78 in filter B on MJD 56982.220
 16.84± 0.07-Open a thumnail image of M33-013424.78 in filter R on MJD 56982.220
----
57038.13 17.10± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 57038.130
 17.16± 0.05-Open a thumnail image of M33-013424.78 in filter B on MJD 57038.130
 16.93± 0.04-Open a thumnail image of M33-013424.78 in filter R on MJD 57038.130
----
57310.13 17.00± 0.05-Open a thumbnail image of M33-013424.78 in filter V on MJD 57310.130
 17.10± 0.07-Open a thumnail image of M33-013424.78 in filter B on MJD 57310.130
 16.79± 0.05-Open a thumnail image of M33-013424.78 in filter R on MJD 57310.130
----
57328.19 16.90± 0.05-Open a thumbnail image of M33-013424.78 in filter V on MJD 57328.190
 16.98± 0.07-Open a thumnail image of M33-013424.78 in filter B on MJD 57328.190
 16.75± 0.07-Open a thumnail image of M33-013424.78 in filter R on MJD 57328.190
----
57335.18 16.95± 0.06-Open a thumbnail image of M33-013424.78 in filter V on MJD 57335.180
---- 16.78± 0.04-Open a thumnail image of M33-013424.78 in filter R on MJD 57335.180
----
57401.10 17.02± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 57401.100
 17.11± 0.05-Open a thumnail image of M33-013424.78 in filter B on MJD 57401.100
--------
57634.34 16.97± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 57634.340
 17.11± 0.07-Open a thumnail image of M33-013424.78 in filter B on MJD 57634.340
 16.85± 0.05-Open a thumnail image of M33-013424.78 in filter R on MJD 57634.340
 16.64± 0.06-Open a thumnail image of M33-013424.78 in filter I on MJD 57634.340
57638.43 16.94± 0.06-Open a thumbnail image of M33-013424.78 in filter V on MJD 57638.430
-------- 16.56± 0.10-Open a thumnail image of M33-013424.78 in filter I on MJD 57638.430
57687.13 17.09± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 57687.130
 17.24± 0.06-Open a thumnail image of M33-013424.78 in filter B on MJD 57687.130
 16.90± 0.04-Open a thumnail image of M33-013424.78 in filter R on MJD 57687.130
 16.74± 0.06-Open a thumnail image of M33-013424.78 in filter I on MJD 57687.130
57964.33 17.01± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 57964.330
 17.07± 0.07-Open a thumnail image of M33-013424.78 in filter B on MJD 57964.330
 16.85± 0.05-Open a thumnail image of M33-013424.78 in filter R on MJD 57964.330
 16.72± 0.06-Open a thumnail image of M33-013424.78 in filter I on MJD 57964.330
58045.18 16.99± 0.05-Open a thumbnail image of M33-013424.78 in filter V on MJD 58045.180
 17.07± 0.07-Open a thumnail image of M33-013424.78 in filter B on MJD 58045.180
 16.81± 0.06-Open a thumnail image of M33-013424.78 in filter R on MJD 58045.180
----
58073.20 17.03± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 58073.200
 17.09± 0.07-Open a thumnail image of M33-013424.78 in filter B on MJD 58073.200
--------
58103.18 16.98± 0.05TOpen a thumbnail image of M33-013424.78 in filter V on MJD 58103.180
------------
58108.11 16.92± 0.05-Open a thumbnail image of M33-013424.78 in filter V on MJD 58108.110
 17.00± 0.08-Open a thumnail image of M33-013424.78 in filter B on MJD 58108.110
---- 16.44± 0.07-Open a thumnail image of M33-013424.78 in filter I on MJD 58108.110
58312.39 16.84± 0.05-Open a thumbnail image of M33-013424.78 in filter V on MJD 58312.390
 16.94± 0.07-Open a thumnail image of M33-013424.78 in filter B on MJD 58312.390
--------
58317.37 16.86± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 58317.370
 16.95± 0.07-Open a thumnail image of M33-013424.78 in filter B on MJD 58317.370
 16.67± 0.04-Open a thumnail image of M33-013424.78 in filter R on MJD 58317.370
----
58341.34 16.95± 0.06-Open a thumbnail image of M33-013424.78 in filter V on MJD 58341.340
-------- 16.60± 0.07-Open a thumnail image of M33-013424.78 in filter I on MJD 58341.340
58342.40 17.01± 0.05-Open a thumbnail image of M33-013424.78 in filter V on MJD 58342.400
 17.09± 0.07-Open a thumnail image of M33-013424.78 in filter B on MJD 58342.400
 16.87± 0.05-Open a thumnail image of M33-013424.78 in filter R on MJD 58342.400
----
58375.14 16.89± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 58375.140
---- 16.74± 0.05-Open a thumnail image of M33-013424.78 in filter R on MJD 58375.140
----
58420.08 17.05± 0.04AOpen a thumbnail image of M33-013424.78 in filter V on MJD 58420.080
Open a thumbnail image of M33-013424.78 in filter V on MJD 58420.080
 17.14± 0.06AOpen a thumnail image of M33-013424.78 in filter B on MJD 58420.080
Open a thumnail image of M33-013424.78 in filter B on MJD 58420.080
 16.79± 0.04-Open a thumnail image of M33-013424.78 in filter R on MJD 58420.080
 16.70± 0.07AOpen a thumnail image of M33-013424.78 in filter I on MJD 58420.080
Open a thumnail image of M33-013424.78 in filter I on MJD 58420.080
58433.00 16.95± 0.05-Open a thumbnail image of M33-013424.78 in filter V on MJD 58433.000
---- 16.75± 0.05-Open a thumnail image of M33-013424.78 in filter R on MJD 58433.000
 16.66± 0.06-Open a thumnail image of M33-013424.78 in filter I on MJD 58433.000
58672.39 16.94± 0.07-Open a thumbnail image of M33-013424.78 in filter V on MJD 58672.390
---- 16.74± 0.05-Open a thumnail image of M33-013424.78 in filter R on MJD 58672.390
 16.64± 0.09-Open a thumnail image of M33-013424.78 in filter I on MJD 58672.390
58695.36 16.85± 0.05-Open a thumbnail image of M33-013424.78 in filter V on MJD 58695.360
 16.96± 0.05-Open a thumnail image of M33-013424.78 in filter B on MJD 58695.360
 16.67± 0.04-Open a thumnail image of M33-013424.78 in filter R on MJD 58695.360
----
58784.12 16.88± 0.05-Open a thumbnail image of M33-013424.78 in filter V on MJD 58784.120
 16.96± 0.05-Open a thumnail image of M33-013424.78 in filter B on MJD 58784.120
--------
58812.22 16.94± 0.05-Open a thumbnail image of M33-013424.78 in filter V on MJD 58812.220
-------- 16.58± 0.05-Open a thumnail image of M33-013424.78 in filter I on MJD 58812.220
58902.07 16.84± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 58902.070
---- 16.68± 0.04-Open a thumnail image of M33-013424.78 in filter R on MJD 58902.070
----
59059.38 16.90± 0.05-Open a thumbnail image of M33-013424.78 in filter V on MJD 59059.380
 16.98± 0.05-Open a thumnail image of M33-013424.78 in filter B on MJD 59059.380
--------
59081.26 16.92± 0.05-Open a thumbnail image of M33-013424.78 in filter V on MJD 59081.260
---- 16.75± 0.05-Open a thumnail image of M33-013424.78 in filter R on MJD 59081.260
----
59084.34-------- 16.70± 0.04TOpen a thumnail image of M33-013424.78 in filter R on MJD 59084.340
----
59161.07 16.88± 0.05-Open a thumbnail image of M33-013424.78 in filter V on MJD 59161.070
 16.98± 0.06-Open a thumnail image of M33-013424.78 in filter B on MJD 59161.070
 16.70± 0.04-Open a thumnail image of M33-013424.78 in filter R on MJD 59161.070
----
59171.09 16.81± 0.05-Open a thumbnail image of M33-013424.78 in filter V on MJD 59171.090
-------- 16.47± 0.06-Open a thumnail image of M33-013424.78 in filter I on MJD 59171.090
59227.08 16.82± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 59227.080
 16.99± 0.04-Open a thumnail image of M33-013424.78 in filter B on MJD 59227.080
 16.63± 0.04-Open a thumnail image of M33-013424.78 in filter R on MJD 59227.080
----
59415.36 16.86± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 59415.360
---- 16.68± 0.04-Open a thumnail image of M33-013424.78 in filter R on MJD 59415.360
----
59441.39 16.89± 0.05-Open a thumbnail image of M33-013424.78 in filter V on MJD 59441.390
 17.03± 0.06-Open a thumnail image of M33-013424.78 in filter B on MJD 59441.390
--------
59463.30 16.88± 0.04AOpen a thumbnail image of M33-013424.78 in filter V on MJD 59463.300
Open a thumbnail image of M33-013424.78 in filter V on MJD 59463.300
-------- 16.52± 0.05-Open a thumnail image of M33-013424.78 in filter I on MJD 59463.300
59523.15 16.88± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 59523.150
---- 16.69± 0.04-Open a thumnail image of M33-013424.78 in filter R on MJD 59523.150
----
59525.15 16.85± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 59525.150
 16.96± 0.04-Open a thumnail image of M33-013424.78 in filter B on MJD 59525.150
--------
59546.15 16.84± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 59546.150
-------- 16.40± 0.05-Open a thumnail image of M33-013424.78 in filter I on MJD 59546.150
59551.11 16.79± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 59551.110
 16.95± 0.05-Open a thumnail image of M33-013424.78 in filter B on MJD 59551.110
--------
59583.15 16.83± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 59583.150
---- 16.62± 0.04-Open a thumnail image of M33-013424.78 in filter R on MJD 59583.150
----
59608.07 16.84± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 59608.070
-------- 16.48± 0.05-Open a thumnail image of M33-013424.78 in filter I on MJD 59608.070
59794.35 16.89± 0.04TOpen a thumbnail image of M33-013424.78 in filter V on MJD 59794.350
------------
59823.24 16.78± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 59823.240
 16.92± 0.04-Open a thumnail image of M33-013424.78 in filter B on MJD 59823.240
--------
59851.13 16.90± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 59851.130
---- 16.73± 0.04-Open a thumnail image of M33-013424.78 in filter R on MJD 59851.130
----
59854.22 16.92± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 59854.220
 17.06± 0.05-Open a thumnail image of M33-013424.78 in filter B on MJD 59854.220
--------
59879.12 16.79± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 59879.120
-------- 16.39± 0.06AOpen a thumnail image of M33-013424.78 in filter I on MJD 59879.120
Open a thumnail image of M33-013424.78 in filter I on MJD 59879.120
59904.12 16.83± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 59904.120
 16.98± 0.04-Open a thumnail image of M33-013424.78 in filter B on MJD 59904.120
 16.66± 0.04-Open a thumnail image of M33-013424.78 in filter R on MJD 59904.120
 16.51± 0.06-Open a thumnail image of M33-013424.78 in filter I on MJD 59904.120
59932.13 16.80± 0.06-Open a thumbnail image of M33-013424.78 in filter V on MJD 59932.130
---- 16.63± 0.05-Open a thumnail image of M33-013424.78 in filter R on MJD 59932.130
----
60172.37 16.86± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 60172.370
 16.99± 0.04-Open a thumnail image of M33-013424.78 in filter B on MJD 60172.370
--------
60205.15 16.83± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 60205.150
---- 16.66± 0.05-Open a thumnail image of M33-013424.78 in filter R on MJD 60205.150
----
60227.12 16.88± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 60227.120
-------- 16.56± 0.06-Open a thumnail image of M33-013424.78 in filter I on MJD 60227.120
60262.13 16.93± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 60262.130
 17.07± 0.04-Open a thumnail image of M33-013424.78 in filter B on MJD 60262.130
 16.77± 0.04-Open a thumnail image of M33-013424.78 in filter R on MJD 60262.130
----
60290.15 16.81± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 60290.150
 16.96± 0.05-Open a thumnail image of M33-013424.78 in filter B on MJD 60290.150
---- 16.48± 0.06-Open a thumnail image of M33-013424.78 in filter I on MJD 60290.150
60292.18 16.83± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 60292.180
---- 16.67± 0.05-Open a thumnail image of M33-013424.78 in filter R on MJD 60292.180
----
60342.08 16.96± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 60342.080
---- 16.77± 0.05-Open a thumnail image of M33-013424.78 in filter R on MJD 60342.080
----
60504.38 16.93± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 60504.380
 17.08± 0.04-Open a thumnail image of M33-013424.78 in filter B on MJD 60504.380
 16.76± 0.05-Open a thumnail image of M33-013424.78 in filter R on MJD 60504.380
----
60529.36 16.98± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 60529.360
-------- 16.59± 0.06-Open a thumnail image of M33-013424.78 in filter I on MJD 60529.360
60556.24 16.88± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 60556.240
 17.01± 0.05-Open a thumnail image of M33-013424.78 in filter B on MJD 60556.240
 16.73± 0.04-Open a thumnail image of M33-013424.78 in filter R on MJD 60556.240
----
60594.10 16.86± 0.05-Open a thumbnail image of M33-013424.78 in filter V on MJD 60594.100
-------- 16.61± 0.06-Open a thumnail image of M33-013424.78 in filter I on MJD 60594.100
60612.14 16.88± 0.05-Open a thumbnail image of M33-013424.78 in filter V on MJD 60612.140
---- 16.70± 0.05-Open a thumnail image of M33-013424.78 in filter R on MJD 60612.140
----
60651.14 16.95± 0.04-Open a thumbnail image of M33-013424.78 in filter V on MJD 60651.140
 17.10± 0.05-Open a thumnail image of M33-013424.78 in filter B on MJD 60651.140
--------
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

Open a plot of photometry for M33-013424.78Open a plot of color for M33-013424.78

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 [0.32 mag]B [0.31 mag]R [0.30 mag]
B [0.31 mag]0.86 (34)
R [0.30 mag]0.92 (36)0.77 (20)
I [0.35 mag]0.73 (20)0.76 (7)0.73 (7)

Magnitude-Magnitude Plots

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

Opens a plot to assess correlation between bands for M33-013424.78

Opens a plot to assess correlation between bands for M33-013424.78

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)		2.45 | 0.72
R
(I|R)		3.02 | 1.082.11 | 0.18
I
(I|R)		2.84 | 1.122.75 | 0.832.01 | 1.53

Back to catalog index

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

Generated on 2026-01-19 14:34:50 UT-5