All names: 2MASS J21170958-7001042, UCAC4 100-102537, GALEX J211709.3-700103, WISE J211709.63-700104.2, GALEXJ21171-7001, EC 21125-7013, Gaia DR2 6375472376424837248, TIC 419571221, TIC 1988167069, Gaia DR3 6375472376424837248
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 21 17 09.36 | 21 17 09.46 (0.03) | ||
| Declination | -70 01 03.25 | -70 01 04.25 (0.03) | ||
| Spectral type | He-sdO | sdOC6.5VIIHe40 | ||
| 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] | 1.01 (0.05) | 0.87 (0.04) | |
| Distance | [pc] | 989.12 (48) | 1146.79 (49) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 25.699 (0.07) | 25.811 (0.04) | |
| Proper motion (declination) | [mas/yr] | -8.78 (0.09) | -8.467 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 13.82 (0.02) | |||
| V magnitude | 14.06 (0.02) | |||
| R magnitude | 14.22 (0.06) | |||
| I magnitude | ||||
| J magnitude | 14.44 (0.04) | 14.44 (0.04) | ||
| H magnitude | 14.41 (0.06) | 14.41 (0.06) | ||
| K magnitude | 14.28 (0.07) | 14.28 (0.07) | ||
| u magnitude | ||||
| g magnitude | 13.87 (0.02) | |||
| r magnitude | 14.29 (0.03) | |||
| i magnitude | 14.69 (0.01) | |||
| z magnitude | ||||
| G magnitude | 14.06 (0.0009) | 14.04 (0.003) | ||
| BP magnitude | 13.82 (0.01) | |||
| RP magnitude | 14.25 (0.005) | |||
| Pan g magnitude | ||||
| Pan r magnitude | ||||
| Pan i magnitude | ||||
| Pan z magnitude | ||||
| Pan y magnitude | ||||
| E(B-V) | 0.029 | |||
* 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.