All names: PG 0901+309, Gaia EDR3 711773838699959296, TIC 166616121, SDSS J090447.71+313251.2, PG0901+309, Gaia DR3 711773838699959296, Gaia DR2 711773838699959296, Ton 380, CBS 2, LAMOST J090447.70+313251.3, LAMOST J090447.76+313252.7, UCAC4 608-045475, GALEX J090447.7+313252, 2MASS J09044769+3132510, UCAC2 42925278
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 09 04 47.71 (0.04) | 09 04 47.72 | 09 04 47.71 (0.04) | ||
| Declination | 31 32 51.24 (0.03) | 31 32 51.42 | 31 32 51.31 (0.03) | ||
| Spectral type | sdOB | sdBHe | |||
| Effective temperature | [K] | 38400.0 (900) | |||
| log(g) | [cgs] | 5.69 (0.3) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 0.77 (0.05) | 0.73 (0.08) | 0.77 (0.05) | |
| Distance | [pc] | 1304.80 (93) | 1369.49 (156) | 1304.80 (93) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 0.891 (0.05) | 0.838 (0.1) | 0.891 (0.05) | |
| Proper motion (declination) | [mas/yr] | -4.103 (0.04) | -4.128 (0.1) | -4.103 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 14.90 (0.03) | ||||
| V magnitude | 15.17 (0.03) | ||||
| R magnitude | 15.26 (0.1) | ||||
| I magnitude | |||||
| J magnitude | 15.76 (0.07) | 15.76 (0.07) | |||
| H magnitude | 15.86 (0.1) | 15.86 (0.1) | |||
| K magnitude | 15.81 | ||||
| u magnitude | 14.48 (0.003) | 14.48 (0.03) | |||
| g magnitude | 14.83 (0.003) | 14.80 (0.05) | |||
| r magnitude | 15.36 (0.003) | 15.35 (0.01) | |||
| i magnitude | 15.72 (0.004) | 15.73 (0.01) | |||
| z magnitude | 16.07 (0.007) | 16.06 (0.02) | |||
| G magnitude | 15.10 (0.003) | 15.12 (0.0005) | 15.10 (0.003) | ||
| BP magnitude | 14.94 (0.003) | 14.88 (0.006) | |||
| RP magnitude | 15.42 (0.004) | 15.41 (0.003) | |||
| Pan g magnitude | 14.93 (0.002) | ||||
| Pan r magnitude | 15.37 (0.001) | ||||
| Pan i magnitude | 15.76 (0.004) | ||||
| Pan z magnitude | 16.05 (0.004) | ||||
| Pan y magnitude | 16.23 (0.004) | ||||
| E(B-V) | 0.022 | ||||
* 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.