All names: PG 1653+633, FBS B 747, GALEX J165422.2+631534, FBS 1653+633, USNO-B1.0 1532-00261670, Gaia DR2 1631599702851400448, UCAC4 767-047191, Gaia EDR3 1631599702851400448, SDSS J165422.25+631534.3, PG1653+633, SDSS J165422.26+631534.1, SDSS J165422.25+631534.2, Gaia DR3 1631599702851400448
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Geier 2020 | Gaia DR2 | Stilism | Simbad | Eisenstein et al. 2006 |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 16 54 22.26 (0.04) | 16 54 22.26 | 16 54 22.27 | 16 54 22.26 (0.05) | 16 54 22.27 (0.04) | 16 54 22.26 | |||
| Declination | 63 15 34.21 (0.05) | 63 15 34.17 | 63 15 34.80 | 63 15 34.21 (0.08) | 63 15 34.30 (0.05) | 63 15 34.29 | |||
| Spectral type | sdOB | sdO9VIIIHe10 | SDB | ||||||
| Effective temperature | [K] | 35493.0 (50) | |||||||
| log(g) | [cgs] | 5.70 (0.02) | |||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.47 (0.05) | 0.46 (0.07) | 0.46 (0.07) | 0.47 (0.05) | ||||
| Distance | [pc] | 2108.96 (235) | 2151.00 (312) | 2151.00 (312) | 2108.81 (235) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | -0.954456101 (0.06) | -1.179 (0.1) | -1.179 (0.1) | -0.954 (0.06) | -0.7 | |||
| Proper motion (declination) | [mas/yr] | -5.449830391 (0.07) | -5.451 (0.1) | -5.451 (0.1) | -5.45 (0.07) | -7.3 | |||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | 16.10 | ||||||||
| V magnitude | |||||||||
| R magnitude | 16.20 | ||||||||
| I magnitude | |||||||||
| J magnitude | |||||||||
| H magnitude | |||||||||
| K magnitude | |||||||||
| u magnitude | 15.60 (0.005) | 15.60 (0.005) | 15.60 (0.005) | 15.63 (0.02) | |||||
| g magnitude | 15.88 (0.004) | 15.88 (0.004) | 15.88 (0.004) | 15.91 (0.01) | |||||
| r magnitude | 16.40 (0.005) | 16.40 (0.005) | 16.40 (0.005) | 16.37 (0.03) | |||||
| i magnitude | 16.77 (0.005) | 16.77 (0.005) | 16.77 (0.005) | 16.80 (0.03) | |||||
| z magnitude | 17.11 (0.01) | 17.11 (0.01) | 17.11 (0.01) | 17.08 (0.02) | |||||
| G magnitude | 16.16 (0.004) | 16.19 (0.001) | 16.19 | 16.16 (0.003) | |||||
| BP magnitude | 16.01 (0.004) | 15.95 (0.01) | 15.95 | ||||||
| RP magnitude | 16.46 (0.005) | 16.45 (0.005) | 16.45 | ||||||
| Pan g magnitude | 15.99 (0.004) | 15.99 (0.004) | |||||||
| Pan r magnitude | 16.42 (0.002) | 16.42 (0.002) | |||||||
| Pan i magnitude | 16.78 (0.003) | 16.78 (0.003) | |||||||
| Pan z magnitude | 17.06 (0.002) | 17.06 (0.002) | |||||||
| Pan y magnitude | 17.27 (0.008) | 17.27 (0.008) | |||||||
| E(B-V) | 0.024 | ||||||||
* 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.