All names: GD 298, LAMOST J093046.83+481623.7, 2MASS J09304677+4816239, Renson 23310, BD+481777, TYC 3429-1180-1, HIC 46659, Gaia DR2 825628714431805056, Gaia EDR3 825628714431805056, GEN# +0.04801777, LAMOST J093047.16+481623.7, HIP 46659, TIC 318217468, TD1 30860, BD+48 1777, FB 56, GSC 03429-01180, Gaia DR3 825628714431805056, UBV M 3703
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 09 30 46.91 (0.05) | 09 30 46.78 | 09 30 46.78 (0.05) | ||
| Declination | 48 16 22.40 (0.05) | 48 16 23.76 | 48 16 23.76 (0.05) | ||
| Spectral type | sdO | sdO9 | |||
| Effective temperature | [K] | 49171.0 (152) | |||
| log(g) | [cgs] | 6.04 (0.04) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 4.24 (0.06) | 4.04 (0.08) | 4.24 (0.06) | |
| Distance | [pc] | 236.09 (3) | 247.46 (5) | 236.09 (3) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 82.003 (0.05) | 82.404 (0.1) | 82.003 (0.05) | |
| Proper motion (declination) | [mas/yr] | -84.858 (0.06) | -85.418 (0.1) | -84.858 (0.06) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 10.41 | ||||
| V magnitude | 10.70 | ||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 11.40 (0.02) | 11.40 (0.02) | |||
| H magnitude | 11.51 (0.02) | 11.51 (0.02) | |||
| K magnitude | 11.59 (0.02) | 11.59 (0.02) | |||
| u magnitude | |||||
| g magnitude | |||||
| r magnitude | |||||
| i magnitude | |||||
| z magnitude | |||||
| G magnitude | 10.64 (0.003) | 10.64 (0.001) | 10.64 (0.003) | ||
| BP magnitude | 10.47 (0.003) | 10.45 (0.006) | |||
| RP magnitude | 10.96 (0.004) | 10.96 (0.0009) | |||
| Pan g magnitude | |||||
| Pan r magnitude | 12.87 (0.001) | ||||
| Pan i magnitude | 13.87 (0.01) | ||||
| 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.