All names: Gaia DR3 6844064264878245504, BPS CS 22944-0066, UCAC4 388-145317, GALEX J214752.4-123545, Gaia DR2 6844064264878245504, GALEXJ21478-1235, EC 21451-1249, 2MASS J21475246-1235442, PHL 149
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 21 47 52.41 | 21 47 52.46 (0.04) | ||
| Declination | -12 35 45.12 | -12 35 44.30 (0.04) | ||
| Spectral type | He-sdO | sdO7.5VIIHe40 | ||
| 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] | 0.74 (0.08) | 0.67 (0.05) | |
| Distance | [pc] | 1348.07 (148) | 1491.20 (114) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -8.512 (0.1) | -8.614 (0.06) | |
| Proper motion (declination) | [mas/yr] | -13.216 (0.1) | -13.165 (0.05) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 14.27 | |||
| V magnitude | 14.55 | |||
| R magnitude | 14.86 (0.2) | |||
| I magnitude | ||||
| J magnitude | 15.10 (0.06) | 15.10 (0.06) | ||
| H magnitude | 15.23 (0.1) | 15.23 (0.1) | ||
| K magnitude | 15.26 (0.2) | 15.26 (0.2) | ||
| u magnitude | ||||
| g magnitude | 14.31 (0.01) | |||
| r magnitude | 14.72 (0.01) | |||
| i magnitude | 15.05 (0.01) | |||
| z magnitude | ||||
| G magnitude | 14.48 (0.001) | 14.47 (0.003) | ||
| BP magnitude | 14.26 (0.008) | |||
| RP magnitude | 14.75 (0.003) | |||
| Pan g magnitude | 14.34 (0.004) | |||
| Pan r magnitude | 14.72 (0.003) | |||
| Pan i magnitude | 15.08 (0.002) | |||
| Pan z magnitude | 15.35 (0.003) | |||
| Pan y magnitude | 15.53 (0.006) | |||
| 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.