All names: SDSSJ084447.00+113910.0, GALEX J084447.0+113911, Gaia DR2 601862464498177664, EPIC 211400847, SDSS J084447.00+113910.0, Gaia DR3 601862464498177664, WISE J084446.99+113909.9, LAMOST J084447.00+113910.0, TIC 443996303, 2MASS J08444700+1139100, SDSS J084447.00+113909.9, UCAC4 509-046843
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 08 44 46.99 | 08 44 47.01 (0.04) | ||
| Declination | 11 39 09.90 | 11 39 10.12 (0.02) | ||
| Spectral type | sdB | sdB | ||
| Effective temperature | [K] | 28905.0 (1115) | ||
| log(g) | [cgs] | 5.37 (0.2) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.14 (0.08) | 0.24 (0.06) | |
| Distance | [pc] | 7072.14 (3816) | 4210.53 (979) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -9.474 (0.1) | -9.03 (0.06) | |
| Proper motion (declination) | [mas/yr] | -16.421 (0.07) | -16.759 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 16.10 (0.03) | |||
| V magnitude | 16.25 (0.08) | |||
| R magnitude | 16.39 (0.2) | |||
| I magnitude | ||||
| J magnitude | 16.05 (0.08) | 16.05 (0.08) | ||
| H magnitude | 15.93 (0.1) | 15.93 (0.1) | ||
| K magnitude | 15.40 (0.1) | 15.40 (0.1) | ||
| u magnitude | 15.93 (0.005) | 15.90 (0.005) | ||
| g magnitude | 15.99 (0.003) | 15.99 (0.003) | ||
| r magnitude | 16.26 (0.004) | 16.27 (0.004) | ||
| i magnitude | 16.44 (0.005) | 16.45 (0.004) | ||
| z magnitude | 16.59 (0.008) | 16.59 (0.008) | ||
| G magnitude | 16.13 (0.0009) | 16.10 (0.003) | ||
| BP magnitude | 16.01 (0.005) | |||
| RP magnitude | 16.15 (0.004) | |||
| Pan g magnitude | 16.00 (0.004) | |||
| Pan r magnitude | 16.28 (0.002) | |||
| Pan i magnitude | 16.48 (0.002) | |||
| Pan z magnitude | 16.63 (0.005) | |||
| Pan y magnitude | 16.72 (0.01) | |||
| E(B-V) | 0.031 | |||
* 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.