All names: Gaia DR2 2626098280727562496, DENIS J221721.7-052749, SDSS J221721.72-052749.9, GALEXJ22173-0527, GALEX J221721.7-052751, WISE J221721.71-052749.9, 2MASS J22172171-0527498, PB 7124, UCAC4 423-139425, UCAC2 30118089, Gaia DR3 2626098280727562496, WISEA J221721.71-052749.8, TIC 439818822
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 22 17 21.78 | 22 17 21.72 (0.03) | ||
| Declination | -05 27 51.17 | -05 27 50.01 (0.03) | ||
| Spectral type | He-sdOB | sdOC9VIIHe40 | ||
| 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] | 0.78 (0.07) | 0.98 (0.04) | |
| Distance | [pc] | 1282.22 (113) | 1024.49 (39) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -3.139 (0.1) | -3.063 (0.04) | |
| Proper motion (declination) | [mas/yr] | 3.939 (0.1) | 4.191 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 14.19 (0.05) | |||
| V magnitude | 14.34 (0.01) | |||
| R magnitude | 14.62 (0.1) | |||
| I magnitude | 14.47 (0.04) | |||
| J magnitude | 14.82 (0.03) | 14.82 (0.03) | ||
| H magnitude | 14.97 (0.06) | 14.97 (0.06) | ||
| K magnitude | 14.99 (0.1) | 14.99 (0.1) | ||
| u magnitude | 13.77 (0.003) | |||
| g magnitude | 14.08 (0.003) | 14.16 (0.01) | ||
| r magnitude | 14.47 (0.003) | 14.53 (0.02) | ||
| i magnitude | 14.79 (0.003) | 14.87 (0.07) | ||
| z magnitude | 15.04 (0.005) | |||
| G magnitude | 14.30 (0.0008) | 14.29 (0.003) | ||
| BP magnitude | 14.11 (0.007) | |||
| RP magnitude | 14.49 (0.002) | |||
| Pan g magnitude | 14.16 (0.003) | |||
| Pan r magnitude | 14.51 (0.002) | |||
| Pan i magnitude | 14.84 (0.002) | |||
| Pan z magnitude | 15.08 (0.008) | |||
| Pan y magnitude | 15.26 (0.004) | |||
| E(B-V) | 0.053 | |||
* 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.