All names: SDSS J021621.23-000758.5, PB 6797, SDSS J021621.23-000758.4, [BGK2006] J021621.23-000758.5, Gaia DR3 2500982202607740416, Gaia DR2 2500982202607740416, GALEX J021621.2-000757, SDSS J021621.22-000758.4, SDSSJ021621.23-000758.5, Gaia EDR3 2500982202607740416, USNO-B1.0 0898-00024008
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Geier 2020 | Gaia DR2 | Stilism | Simbad | Eisenstein et al. 2006 |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 02 16 21.23 (0.08) | 02 16 21.23 | 02 16 21.23 | 02 16 21.23 (0.09) | 02 16 21.23 (0.08) | 02 16 21.23 | |||
| Declination | -00 07 58.53 (0.07) | -00 07 58.54 | -00 07 58.55 | -00 07 58.53 (0.09) | -00 07 58.48 (0.07) | -00 07 58.48 | |||
| Spectral type | sdB | sdB | SD_auto | ||||||
| Effective temperature | [K] | 19611.0 (145) | |||||||
| log(g) | [cgs] | 5.00 (0.001) | |||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.06 (0.09) | 0.07 (0.1) | 0.07 (0.1) | 0.06 (0.09) | ||||
| Distance | [pc] | 15396.48 (21276) | 13908.21 (21626) | 13905.82 (21628) | 15408.32 (21320) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | -0.610679061 (0.1) | -0.627 (0.2) | -0.62678404 (0.2) | -0.611 (0.1) | 2.1 | |||
| Proper motion (declination) | [mas/yr] | -3.405095373 (0.09) | -3.49 (0.2) | -3.489537364 (0.2) | -3.405 (0.1) | -5.7 | |||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | 17.60 | ||||||||
| V magnitude | |||||||||
| R magnitude | 17.40 | ||||||||
| I magnitude | |||||||||
| J magnitude | |||||||||
| H magnitude | |||||||||
| K magnitude | |||||||||
| u magnitude | 17.69 (0.01) | 17.69 (0.01) | 17.66 (0.01) | 17.63 (0.01) | |||||
| g magnitude | 17.20 (0.005) | 17.20 (0.005) | 17.20 (0.005) | 17.20 (0.02) | |||||
| r magnitude | 17.53 (0.006) | 17.53 (0.006) | 17.53 (0.006) | 17.51 (0.01) | |||||
| i magnitude | 17.77 (0.008) | 17.77 (0.008) | 17.77 (0.008) | 17.75 (0.02) | |||||
| z magnitude | 17.97 (0.02) | 17.97 (0.02) | 17.90 (0.02) | 17.92 (0.03) | |||||
| G magnitude | 17.38 (0.008) | 17.41 (0.002) | 17.41 | 17.38 (0.003) | |||||
| BP magnitude | 17.36 (0.008) | 17.33 (0.01) | 17.33 | ||||||
| RP magnitude | 17.46 (0.01) | 17.45 (0.03) | 17.45 | ||||||
| Pan g magnitude | 17.27 (0.003) | 17.27 (0.003) | |||||||
| Pan r magnitude | 17.54 (0.007) | 17.54 (0.007) | |||||||
| Pan i magnitude | 17.80 (0.005) | 17.80 (0.005) | |||||||
| Pan z magnitude | 17.97 (0.009) | 17.97 (0.009) | |||||||
| Pan y magnitude | 18.06 (0.006) | 18.06 (0.006) | |||||||
| E(B-V) | 0.029 | ||||||||
* 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.