All names: Gaia DR2 239963297458869504, SDSS J030749.26+411401.6, Gaia DR3 239963297458869504, SDSSJ030749.25+411401.6, TIC 642677463
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 03 07 49.25 | 03 07 49.26 (0.07) | ||
| Declination | 41 14 01.60 | 41 14 01.68 (0.07) | ||
| Spectral type | sdB | sdB | ||
| 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] | 0.04 (0.1) | 0.12 (0.1) | |
| Distance | [pc] | 23866.35 (81225) | 8628.13 (7839) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 1.591 (0.3) | 1.437 (0.1) | |
| Proper motion (declination) | [mas/yr] | -5.58 (0.2) | -5.565 (0.1) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | ||||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | ||||
| H magnitude | ||||
| K magnitude | ||||
| u magnitude | 17.54 (0.01) | 17.54 (0.01) | ||
| g magnitude | 17.53 (0.005) | 17.53 (0.005) | ||
| r magnitude | 17.69 (0.006) | 17.69 (0.006) | ||
| i magnitude | 17.83 (0.007) | 17.83 (0.007) | ||
| z magnitude | 17.91 (0.02) | 17.91 (0.02) | ||
| G magnitude | 17.62 (0.002) | 17.58 (0.003) | ||
| BP magnitude | 17.56 (0.009) | |||
| RP magnitude | 17.52 (0.01) | |||
| Pan g magnitude | 17.58 (0.006) | |||
| Pan r magnitude | 17.73 (0.004) | |||
| Pan i magnitude | 17.84 (0.006) | |||
| Pan z magnitude | 17.93 (0.007) | |||
| Pan y magnitude | 17.95 (0.02) | |||
| E(B-V) | 0.134 | |||
* 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.