All names: 2MASS J22581028+4043401, Gaia DR3 1930945626165804032, LAMOST J225810.28+404339.9, FBS2255+404, FBS B 191, Gaia DR2 1930945626165804032, FBS 2255+404, TIC 346336897
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 22 58 10.32 | 22 58 10.29 (0.03) | ||
| Declination | 40 43 40.10 | 40 43 40.03 (0.03) | ||
| Spectral type | He-sdOB | sdOD | ||
| Effective temperature | [K] | 43920.0 (290) | ||
| log(g) | [cgs] | 5.55 (0.03) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.42 (0.07) | 0.40 (0.04) | |
| Distance | [pc] | 2394.06 (399) | 2518.26 (282) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -5.47 (0.1) | -5.515 (0.05) | |
| Proper motion (declination) | [mas/yr] | -4.358 (0.09) | -4.253 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | ||||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 16.16 (0.1) | 16.16 (0.1) | ||
| H magnitude | 16.32 (0.2) | 16.32 (0.2) | ||
| K magnitude | 15.35 | |||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 15.99 (0.001) | 15.97 (0.003) | ||
| BP magnitude | 15.82 (0.005) | |||
| RP magnitude | 16.16 (0.004) | |||
| Pan g magnitude | 15.88 (0.007) | |||
| Pan r magnitude | 16.19 (0.004) | |||
| Pan i magnitude | 16.48 (0.003) | |||
| Pan z magnitude | 16.73 (0.003) | |||
| Pan y magnitude | 16.91 (0.005) | |||
| E(B-V) | 0.106 | |||
* 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.