All names: Gaia DR3 6675995189496107776, GALEX J203031.7-435808, USNO-B1.0 0460-00725657, BPS CS 22943-0148, BPSCS22943-148, UCAC2 13255966, GSC 07962-00548, 2MASS J20303176-4358086, USNO-A1.0 0450-39118821, EC 20271-4408, Gaia DR2 6675995189496107776, TIC 90850253, UCAC4 231-180964
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 20 30 31.77 | 20 30 31.77 (0.03) | ||
| Declination | -43 58 08.60 | -43 58 08.77 (0.02) | ||
| 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] | 0.50 (0.05) | 0.60 (0.04) | |
| Distance | [pc] | 2008.03 (206) | 1671.40 (114) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -5.213 (0.08) | -5.265 (0.04) | |
| Proper motion (declination) | [mas/yr] | -9.803 (0.06) | -10.229 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.16 | |||
| V magnitude | 15.10 | |||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 14.65 (0.04) | 14.65 (0.04) | ||
| H magnitude | 14.42 (0.05) | 14.42 (0.05) | ||
| K magnitude | 14.19 (0.07) | 14.19 (0.07) | ||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 15.01 (0.0006) | 14.99 (0.003) | ||
| BP magnitude | 14.97 (0.006) | |||
| RP magnitude | 14.90 (0.002) | |||
| Pan g magnitude | ||||
| Pan r magnitude | ||||
| Pan i magnitude | ||||
| Pan z magnitude | ||||
| Pan y magnitude | ||||
| 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.