All names: FBS B 667, 2MASS J08404400+6147520, PG 0836+619, SDSS J084043.98+614752.0, Gaia DR3 1042158494227683072, Gaia DR2 1042158494227683072, GALEX J084043.9+614752, TIC 356479476, UCAC4 759-039900, FBS 0836+619, Gaia EDR3 1042158494227683072, PG0836+619
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 08 40 43.98 (0.02) | 08 40 44.12 | 08 40 44.00 (0.02) | ||
| Declination | 61 47 51.96 (0.02) | 61 47 51.97 | 61 47 52.05 (0.02) | ||
| Spectral type | He-sdO | sdO | |||
| 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] | 1.14 (0.03) | 1.07 (0.05) | 1.14 (0.03) | |
| Distance | [pc] | 877.96 (25) | 938.61 (42) | 877.96 (25) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -11.06 (0.02) | -11.037 (0.07) | -11.06 (0.02) | |
| Proper motion (declination) | [mas/yr] | -5.248 (0.03) | -5.209 (0.06) | -5.248 (0.03) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 14.12 (0.1) | ||||
| V magnitude | 14.35 (0.07) | ||||
| R magnitude | 14.68 (0.1) | ||||
| I magnitude | |||||
| J magnitude | 14.92 (0.03) | 14.92 (0.03) | |||
| H magnitude | 14.92 (0.08) | 14.92 (0.08) | |||
| K magnitude | 15.01 (0.1) | 15.01 (0.1) | |||
| u magnitude | 14.02 (0.003) | 13.95 (0.02) | |||
| g magnitude | 14.18 (0.003) | 14.17 (0.02) | |||
| r magnitude | 14.57 (0.003) | 14.60 (0.01) | |||
| i magnitude | 14.86 (0.004) | 14.87 (0.01) | |||
| z magnitude | 15.15 (0.005) | 15.18 (0.02) | |||
| G magnitude | 14.38 (0.003) | 14.39 (0.0005) | 14.38 (0.003) | ||
| BP magnitude | 14.27 (0.003) | 14.22 (0.006) | |||
| RP magnitude | 14.56 (0.004) | 14.56 (0.002) | |||
| Pan g magnitude | 14.27 (0.006) | ||||
| Pan r magnitude | 14.58 (0.004) | ||||
| Pan i magnitude | 14.89 (0.002) | ||||
| Pan z magnitude | 15.14 (0.004) | ||||
| Pan y magnitude | 15.31 (0.007) | ||||
| E(B-V) | 0.043 | ||||
* 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.