All names: TOI-709, USNO-A1.0 0300-01320497, [BBW2000] FD 42, EC 04214-5415, LB 1721, 2MASS J04223726-5408498, Gaia DR3 4779307463731785088, TIC 396720998, FAUST 551, GALEXJ04226-5408, GALEX J042237.1-540850, Gaia DR2 4779307463731785088
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 04 22 37.17 | 04 22 37.28 (0.05) | ||
| Declination | -54 08 50.25 | -54 08 49.83 (0.06) | ||
| Spectral type | sdO | sdOC9VIIHe38 | ||
| 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] | 0.71 (0.06) | 0.83 (0.06) | |
| Distance | [pc] | 1415.43 (122) | 1207.44 (88) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 8.37 (0.1) | 8.849 (0.07) | |
| Proper motion (declination) | [mas/yr] | -0.758 (0.1) | -0.628 (0.09) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 14.02 | |||
| V magnitude | 14.21 | |||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 14.09 (0.03) | 14.09 (0.03) | ||
| H magnitude | 13.80 (0.02) | 13.80 (0.02) | ||
| K magnitude | 13.84 (0.06) | 13.84 (0.06) | ||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 14.04 (0.0009) | 14.03 (0.003) | ||
| BP magnitude | 13.88 (0.009) | |||
| RP magnitude | 14.11 (0.001) | |||
| Pan g magnitude | ||||
| Pan r magnitude | ||||
| Pan i magnitude | ||||
| Pan z magnitude | ||||
| Pan y magnitude | ||||
| E(B-V) | 0.012 | |||
* 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.