All names: LAMOST J000015.76+173852.9, Gaia DR2 2773760665114010880, PG 2357+174, PG2357+174, Gaia DR3 2773760665114010880, SDSS J000015.76+173852.9, Gaia EDR3 2773760665114010880, USNO-B1.0 1076-00000053, GALEX J000015.7+173852
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 00 00 15.77 (0.05) | 00 00 15.75 | 00 00 15.76 (0.05) | ||
| Declination | 17 38 52.92 (0.04) | 17 38 53.13 | 17 38 52.96 (0.04) | ||
| Spectral type | sdOB | sdB | |||
| Effective temperature | [K] | 38122.0 (490) | |||
| log(g) | [cgs] | 6.10 (0.2) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 0.31 (0.07) | 0.49 (0.1) | 0.31 (0.07) | |
| Distance | [pc] | 3225.81 (776) | 2048.76 (498) | 3225.81 (776) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 6.713 (0.07) | 6.468 (0.2) | 6.713 (0.07) | |
| Proper motion (declination) | [mas/yr] | -2.658 (0.04) | -2.756 (0.08) | -2.658 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 16.30 | ||||
| V magnitude | |||||
| R magnitude | 16.50 | ||||
| I magnitude | |||||
| J magnitude | |||||
| H magnitude | |||||
| K magnitude | |||||
| u magnitude | 15.99 (0.006) | ||||
| g magnitude | 16.32 (0.004) | ||||
| r magnitude | 16.80 (0.004) | ||||
| i magnitude | 17.16 (0.006) | ||||
| z magnitude | 17.45 (0.02) | ||||
| G magnitude | 16.52 (0.003) | 16.55 (0.001) | 16.52 (0.003) | ||
| BP magnitude | 16.39 (0.005) | 16.32 (0.007) | |||
| RP magnitude | 16.81 (0.008) | 16.79 (0.005) | |||
| Pan g magnitude | 16.35 (0.001) | ||||
| Pan r magnitude | 16.76 (0.004) | ||||
| Pan i magnitude | 17.13 (0.002) | ||||
| Pan z magnitude | 17.39 (0.005) | ||||
| Pan y magnitude | 17.58 (0.009) | ||||
| E(B-V) | 0.045 | ||||
* 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.