All names: Gaia DR2 6857162888635380352, Gaia EDR3 6857162609461043456, BPSCS22880-78, EC 20462-2041, GALEX J204908.9-203005, 2MASS J20490890-2030053, TIC 418787518, BPS CS 22880-0078, Gaia DR3 6857162888635380352
Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
---|---|---|---|---|---|
Right ascension | 20 49 13.41 (0.4) | 20 49 08.87 | 20 49 08.91 (0.04) | ||
Declination | -20 31 18.44 (0.2) | -20 30 05.83 | -20 30 05.47 (0.02) | ||
Spectral type | sdB | sdB | |||
Effective temperature | [K] | ||||
log(g) | [cgs] | ||||
Mass | [M☉] | ||||
log(Luminosity) | [L☉] | ||||
Cooling age | [Gyr] | ||||
log(H/He) | |||||
log(C/He) | |||||
log(Ca/He) | |||||
log(Ca/H) | |||||
Parallax | [mas] | 1.89 (0.5) | 0.60 (0.06) | 0.50 (0.05) | |
Distance | [pc] | 530.14 (128) | 1659.48 (178) | 2005.62 (210) | |
Composition | |||||
Proper motion (right ascension) | [mas/yr] | 0.276 (0.5) | 2.194 (0.1) | 2.304 (0.05) | |
Proper motion (declination) | [mas/yr] | -3.099 (0.3) | 2.432 (0.06) | 1.72 (0.04) | |
Variability | |||||
Magnetic | |||||
Bd | [MG] | ||||
Infrared excess (disk) | |||||
Binarity | |||||
B magnitude | 15.23 | ||||
V magnitude | 15.30 | ||||
R magnitude | |||||
I magnitude | |||||
J magnitude | 14.54 (0.04) | 14.54 (0.04) | |||
H magnitude | 14.08 (0.04) | 14.08 (0.04) | |||
K magnitude | 14.00 (0.05) | 14.00 (0.05) | |||
u magnitude | |||||
g magnitude | |||||
r magnitude | |||||
i magnitude | |||||
z magnitude | |||||
G magnitude | 19.70 (0.004) | 15.17 (0.0007) | 15.15 (0.003) | ||
BP magnitude | 20.08 (0.05) | 15.17 (0.006) | |||
RP magnitude | 19.29 (0.04) | 14.99 (0.003) | |||
Pan g magnitude | 15.24 (0.005) | ||||
Pan r magnitude | 15.34 (0.005) | ||||
Pan i magnitude | 15.37 (0.002) | ||||
Pan z magnitude | 15.43 (0.003) | ||||
Pan y magnitude | 15.40 (0.005) | ||||
E(B-V) | 0.034 |
* 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.