All names: USNO-B1.0 0989-00586791, SDSS J214904.79+085520.5, LAMOSTJ214904.80+085520.7, 2MASS J21490479+0855207, LAMOST J214904.80+085520.7, TIC 466383848, UCAC4 495-141724, UCAC2 34941396, PG 2146+087, Gaia DR2 2725882156404263808, Gaia DR3 2725882156404263808
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 21 49 04.80 | 21 49 04.80 (0.02) | ||
| Declination | 08 55 20.73 | 08 55 20.70 (0.02) | ||
| Spectral type | sdB | sdB | ||
| Effective temperature | [K] | 23095.0 (258) | ||
| log(g) | [cgs] | 4.95 (0.01) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.64 (0.04) | 0.63 (0.03) | |
| Distance | [pc] | 1556.66 (109) | 1584.79 (67) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 0.419 (0.07) | 0.374 (0.03) | |
| Proper motion (declination) | [mas/yr] | -5.787 (0.07) | -5.951 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 14.20 | |||
| V magnitude | ||||
| R magnitude | 14.44 (0.1) | |||
| I magnitude | ||||
| J magnitude | 14.41 (0.03) | 14.41 (0.03) | ||
| H magnitude | 14.43 (0.04) | 14.43 (0.04) | ||
| K magnitude | 14.64 (0.1) | 14.64 (0.1) | ||
| u magnitude | 14.31 (0.004) | |||
| g magnitude | 16.53 (0.01) | |||
| r magnitude | 14.34 (0.004) | |||
| i magnitude | 14.57 (0.004) | |||
| z magnitude | 14.78 (0.005) | |||
| G magnitude | 14.21 (0.0006) | 14.20 (0.003) | ||
| BP magnitude | 14.14 (0.006) | |||
| RP magnitude | 14.26 (0.002) | |||
| Pan g magnitude | 14.10 (0.001) | |||
| Pan r magnitude | 14.34 (0.001) | |||
| Pan i magnitude | 14.60 (0.003) | |||
| Pan z magnitude | 14.79 (0.002) | |||
| Pan y magnitude | 14.90 (0.004) | |||
| E(B-V) | 0.051 | |||
* 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.