All names: 2MASS J22554583+4938167, KPD2253+4922, Gaia DR3 1985886916540915968, UCAC2 48058837, TIC 431309982, KPD 2253+4922, UCAC4 699-116880, Gaia DR2 1985886916540915968
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 22 55 45.88 | 22 55 45.86 (0.02) | ||
| Declination | 49 38 17.13 | 49 38 16.77 (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] | 0.67 (0.04) | 0.67 (0.03) | |
| Distance | [pc] | 1497.23 (93) | 1489.87 (61) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 0.092 (0.07) | 0.228 (0.03) | |
| Proper motion (declination) | [mas/yr] | -5.298 (0.07) | -5.251 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.50 | |||
| V magnitude | 15.56 | |||
| R magnitude | 15.79 (0.1) | |||
| I magnitude | ||||
| J magnitude | 15.80 (0.07) | 15.80 (0.07) | ||
| H magnitude | 15.68 (0.1) | 15.68 (0.1) | ||
| K magnitude | 15.68 (0.2) | 15.68 (0.2) | ||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 15.51 (0.0006) | 15.49 (0.003) | ||
| BP magnitude | 15.42 (0.004) | |||
| RP magnitude | 15.55 (0.003) | |||
| Pan g magnitude | 15.43 (0.003) | |||
| Pan r magnitude | 15.66 (0.003) | |||
| Pan i magnitude | 15.89 (0.002) | |||
| Pan z magnitude | 16.09 (0.005) | |||
| Pan y magnitude | 16.20 (0.006) | |||
| 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.