All names: SDSS J091207.28+161320.3, 2MASS J09120729+1613204, Gaia DR2 607898538520616704, GALEX J091207.3+161317, Gaia DR3 607898538520616704, PG 0909+164, PG0909+164, LAMOST J091207.29+161320.4, [TFW97] J091207.29+161320.35, TIC 35227595
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 09 12 07.30 | 09 12 07.29 (0.03) | ||
| Declination | 16 13 20.62 | 16 13 20.45 (0.03) | ||
| Spectral type | sdB | sdO8VIIHe1 | ||
| Effective temperature | [K] | 35300.0 (500) | ||
| log(g) | [cgs] | 5.33 (0.05) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.85 (0.06) | 0.84 (0.04) | |
| Distance | [pc] | 1170.41 (81) | 1184.97 (60) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -4.532 (0.09) | -4.594 (0.04) | |
| Proper motion (declination) | [mas/yr] | -2.093 (0.07) | -2.169 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 13.88 | |||
| V magnitude | 13.85 | |||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 14.48 (0.03) | 14.48 (0.03) | ||
| H magnitude | 14.69 (0.06) | 14.69 (0.06) | ||
| K magnitude | 14.61 (0.08) | 14.61 (0.08) | ||
| u magnitude | 13.79 (0.004) | 13.79 (0.004) | ||
| g magnitude | 13.77 (0.004) | 13.77 (0.004) | ||
| r magnitude | 14.22 (0.003) | 14.22 (0.003) | ||
| i magnitude | 14.74 (0.006) | 14.74 (0.006) | ||
| z magnitude | 14.81 (0.005) | 14.81 (0.005) | ||
| G magnitude | 13.81 (0.0007) | 13.79 (0.003) | ||
| BP magnitude | 13.58 (0.007) | |||
| RP magnitude | 14.09 (0.002) | |||
| Pan g magnitude | 13.62 (0.006) | |||
| Pan r magnitude | 14.05 (0.001) | |||
| Pan i magnitude | 14.42 (0.0002) | |||
| Pan z magnitude | 14.71 (0.005) | |||
| Pan y magnitude | 14.88 (0.01) | |||
| E(B-V) | 0.028 | |||
* 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.