All names: LAMOST J213911.57+453915.2, 2MASS J21391157+4539155, Gaia DR2 1974122417009203968, TIC 305867900, Gaia DR3 1974122417009203968, LAMOSTJ213911.57+453915.2
Parameter | Unit | Geier 2020 | Stilism | Simbad |
---|---|---|---|---|
Right ascension | 21 39 11.58 | 21 39 11.58 (0.03) | ||
Declination | 45 39 15.29 | 45 39 15.64 (0.04) | ||
Spectral type | He-sdB | sdB/sdO | ||
Effective temperature | [K] | 23112.0 (86) | ||
log(g) | [cgs] | 4.89 (0.01) | ||
Mass | [M☉] | |||
log(Luminosity) | [L☉] | |||
Cooling age | [Gyr] | |||
log(H/He) | ||||
log(C/He) | ||||
log(Ca/He) | ||||
log(Ca/H) | ||||
Parallax | [mas] | 0.19 (0.05) | 0.21 (0.04) | |
Distance | [pc] | 5373.46 (1582) | 4759.64 (1008) | |
Composition | ||||
Proper motion (right ascension) | [mas/yr] | -4.021 (0.09) | -3.931 (0.05) | |
Proper motion (declination) | [mas/yr] | -5.612 (0.09) | -5.622 (0.04) | |
Variability | ||||
Magnetic | ||||
Bd | [MG] | |||
Infrared excess (disk) | ||||
Binarity | ||||
B magnitude | ||||
V magnitude | ||||
R magnitude | ||||
I magnitude | ||||
J magnitude | 16.39 (0.1) | 16.39 (0.1) | ||
H magnitude | 16.02 (0.2) | 16.02 (0.2) | ||
K magnitude | 15.46 | |||
u magnitude | ||||
g magnitude | ||||
r magnitude | ||||
i magnitude | ||||
z magnitude | ||||
G magnitude | 16.57 (0.0009) | 16.54 (0.003) | ||
BP magnitude | 16.57 (0.004) | |||
RP magnitude | 16.47 (0.005) | |||
Pan g magnitude | 16.54 (0.006) | |||
Pan r magnitude | 16.65 (0.006) | |||
Pan i magnitude | 16.81 (0.004) | |||
Pan z magnitude | 16.95 (0.006) | |||
Pan y magnitude | 17.01 (0.01) | |||
E(B-V) | 0.282 |
* Constant surface field
Spectra without link are available upon request
The Montreal White Dwarf Database is produced and maintained by Prof. Patrick Dufour (Université de Montréal) and Dr. Simon Blouin (University of Victoria). Please send database updates, corrections, suggestions or bug reports to patrick.dufour@umontreal.ca.