All names: 2MASS J21542199-2359594, PHL 196, TIC 53939726, Gaia DR2 6813473824169554816, UCAC4 331-211237, GALEX J215422.1-235959, GALEXJ21543-2359, Gaia DR3 6813473824169554816, EC 21515-2414
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 21 54 22.00 | 21 54 21.99 (0.06) | ||
| Declination | -23 59 59.17 | -23 59 59.39 (0.06) | ||
| 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] | 1.27 (0.08) | 0.90 (0.07) | |
| Distance | [pc] | 786.97 (51) | 1115.70 (89) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 9.239 (0.1) | 9.147 (0.08) | |
| Proper motion (declination) | [mas/yr] | -8.92 (0.1) | -8.541 (0.07) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 14.63 (0.04) | |||
| V magnitude | 14.73 (0.02) | |||
| R magnitude | 15.14 (0.1) | |||
| I magnitude | ||||
| J magnitude | 14.76 (0.03) | 14.76 (0.03) | ||
| H magnitude | 14.61 (0.05) | 14.61 (0.05) | ||
| K magnitude | 14.46 (0.08) | 14.46 (0.08) | ||
| u magnitude | ||||
| g magnitude | 14.60 (0.02) | |||
| r magnitude | ||||
| i magnitude | 15.18 (0.1) | |||
| z magnitude | ||||
| G magnitude | 14.71 (0.0008) | 14.72 (0.003) | ||
| BP magnitude | 14.56 (0.009) | |||
| RP magnitude | 14.81 (0.002) | |||
| Pan g magnitude | 14.57 (0.003) | |||
| Pan r magnitude | 14.91 (0.002) | |||
| Pan i magnitude | 15.16 (0.001) | |||
| Pan z magnitude | 15.34 (0.003) | |||
| Pan y magnitude | 15.43 (0.005) | |||
| E(B-V) | 0.021 | |||
* 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.