All names: Gaia EDR3 2684009283284602880, UCAC2 33154013, LAMOST J220716.49+034219.7, GALEX J220716.4+034219, 2MASS J22071650+0342197, PG2204+034, [TFW97] J220716.49+034219.82, Gaia DR3 2684009283284602880, UCAC4 469-132972, PG 2204+035, SDSS J220716.49+034219.8, HIDDEN NAME PG 2204+034, Gaia DR2 2684009283284602880
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 22 07 16.50 (0.04) | 22 07 16.49 | 22 07 16.50 (0.04) | ||
| Declination | 03 42 19.83 (0.03) | 03 42 19.79 | 03 42 19.85 (0.03) | ||
| Spectral type | sdB | sdB1VIIHe10 | |||
| Effective temperature | [K] | 33130.0 (600) | |||
| log(g) | [cgs] | 5.96 (0.1) | |||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 1.59 (0.04) | 1.61 (0.07) | 1.59 (0.04) | |
| Distance | [pc] | 630.60 (16) | 619.23 (25) | 630.60 (16) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 3.498 (0.05) | 3.473 (0.1) | 3.498 (0.05) | |
| Proper motion (declination) | [mas/yr] | -0.989 (0.04) | -1.069 (0.09) | -0.989 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 14.10 (0.04) | ||||
| V magnitude | 14.31 (0.02) | ||||
| R magnitude | 14.51 (0.1) | ||||
| I magnitude | |||||
| J magnitude | 14.85 (0.04) | 14.85 (0.04) | |||
| H magnitude | 15.04 (0.09) | 15.04 (0.09) | |||
| K magnitude | 15.18 (0.2) | 15.18 (0.2) | |||
| u magnitude | 13.77 (0.003) | 13.77 (0.003) | |||
| g magnitude | 13.96 (0.003) | 13.96 (0.003) | |||
| r magnitude | 14.44 (0.003) | 14.44 (0.003) | |||
| i magnitude | 14.76 (0.004) | 14.76 (0.004) | |||
| z magnitude | 15.09 (0.005) | 15.09 (0.005) | |||
| G magnitude | 14.19 (0.003) | 14.21 (0.001) | 14.19 (0.003) | ||
| BP magnitude | 14.06 (0.003) | 14.01 (0.009) | |||
| RP magnitude | 14.44 (0.004) | 14.45 (0.004) | |||
| Pan g magnitude | 14.03 (0.003) | ||||
| Pan r magnitude | 14.44 (0.003) | ||||
| Pan i magnitude | 14.80 (0.002) | ||||
| Pan z magnitude | 15.05 (0.002) | ||||
| Pan y magnitude | 15.21 (0.009) | ||||
| E(B-V) | 0.077 | ||||
* 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.