All names: Gaia DR2 2847977322031768832, Gaia EDR3 2847977322031768832, 2MASS J00001840+2218029, HS2357+2201, GALEX J000018.3+221803, LAMOST J000018.40+221802.8, Gaia DR3 2847977322031768832, HS 2357+2201
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 00 00 18.41 (0.03) | 00 00 18.40 | 00 00 18.40 (0.03) | ||
| Declination | 22 18 02.77 (0.02) | 22 18 02.99 | 22 18 02.96 (0.02) | ||
| Spectral type | sdB | sdB | |||
| Effective temperature | [K] | 27629.0 (500) | |||
| log(g) | [cgs] | 5.55 (0.05) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 1.18 (0.04) | 1.07 (0.08) | 1.18 (0.04) | |
| Distance | [pc] | 847.96 (26) | 936.77 (73) | 847.96 (26) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 5.392 (0.04) | 5.517 (0.1) | 5.392 (0.04) | |
| Proper motion (declination) | [mas/yr] | -12.113 (0.02) | -11.984 (0.06) | -12.113 (0.02) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 13.30 | ||||
| V magnitude | |||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 14.77 (0.04) | 14.77 (0.04) | |||
| H magnitude | 15.08 (0.08) | 15.08 (0.08) | |||
| K magnitude | 14.87 (0.1) | 14.87 (0.1) | |||
| u magnitude | 13.92 (0.003) | ||||
| g magnitude | 14.01 (0.003) | ||||
| r magnitude | 14.43 (0.004) | ||||
| i magnitude | 14.73 (0.004) | ||||
| z magnitude | 15.01 (0.005) | ||||
| G magnitude | 14.22 (0.003) | 14.24 (0.0004) | 14.22 (0.003) | ||
| BP magnitude | 14.11 (0.003) | 14.07 (0.004) | |||
| RP magnitude | 14.43 (0.004) | 14.43 (0.001) | |||
| Pan g magnitude | 14.09 (0.003) | ||||
| Pan r magnitude | 14.44 (0.003) | ||||
| Pan i magnitude | 14.77 (0.002) | ||||
| Pan z magnitude | 15.01 (0.004) | ||||
| Pan y magnitude | 15.17 (0.006) | ||||
| E(B-V) | 0.052 | ||||
* 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.