All names: Gaia EDR3 1781594769874699776, Gaia DR2 1781594769874699776, SDSS J220429.52+211610.6, SDSSJ220429.52+211610.8, SDSS J220429.52+211610.7, TIC 420822550, 2MASS J22042954+2116112, Gaia DR3 1781594769874699776, SDSS J220429.52+211610.63
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | Geier 2020 | Gaia DR2 | Stilism | Kepler et al. 2015 | Simbad |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 22 04 29.52 (0.04) | 22 04 29.53 | 22 04 29.52 | 22 04 29.52 (0.05) | 22 04 29.53 (0.04) | ||||
| Declination | 21 16 10.56 (0.04) | 21 16 10.75 | 21 16 10.80 | 21 16 10.57 (0.06) | 21 16 10.87 (0.04) | ||||
| Spectral type | He-sdO | He-sdO | sdOHe | ||||||
| Effective temperature | [K] | 49967.0 (5000) | 75000.0 (25000) | ||||||
| log(g) | [cgs] | 5.84 (0.2) | 6.25 (0.01) | ||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.23 (0.05) | 0.33 (0.06) | 0.33 (0.06) | 0.23 (0.05) | ||||
| Distance | [pc] | 4391.92 (932) | 2994.91 (570) | 2994.84 (571) | 4391.74 (932) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | -12.44364991 (0.05) | -12.422 (0.1) | -12.42194735 (0.1) | -12.444 (0.05) | ||||
| Proper motion (declination) | [mas/yr] | -19.37426949 (0.05) | -19.412 (0.1) | -19.41244253 (0.1) | -19.374 (0.05) | ||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | |||||||||
| V magnitude | |||||||||
| R magnitude | |||||||||
| I magnitude | |||||||||
| J magnitude | 16.25 (0.1) | 16.25 (0.1) | |||||||
| H magnitude | 16.23 (0.2) | 16.23 (0.2) | |||||||
| K magnitude | 16.22 | ||||||||
| u magnitude | 15.22 (0.004) | 15.22 (0.004) | 15.24 (0.03) | 15.22 (0.004) | |||||
| g magnitude | 15.57 (0.003) | 15.57 (0.003) | 15.59 (0.01) | 15.57 (0.003) | |||||
| r magnitude | 16.02 (0.004) | 16.02 (0.004) | 16.02 (0.01) | 16.02 (0.004) | |||||
| i magnitude | 16.37 (0.004) | 16.37 (0.004) | 16.38 (0.01) | 16.37 (0.004) | |||||
| z magnitude | 16.65 (0.01) | 16.65 (0.01) | 16.64 (0.02) | 16.65 (0.01) | |||||
| G magnitude | 15.80 (0.003) | 15.82 (0.002) | 15.82 | 15.80 (0.003) | |||||
| BP magnitude | 15.66 (0.003) | 15.61 (0.01) | 15.61 | ||||||
| RP magnitude | 16.06 (0.004) | 16.06 (0.005) | 16.06 | ||||||
| Pan g magnitude | 15.64 (0.005) | 15.64 (0.005) | |||||||
| Pan r magnitude | 16.04 (0.002) | 16.05 (0.002) | |||||||
| Pan i magnitude | 16.39 (0.002) | 16.39 (0.002) | |||||||
| Pan z magnitude | 16.66 (0.004) | 16.66 (0.004) | |||||||
| Pan y magnitude | 16.84 (0.01) | 16.84 (0.01) | |||||||
| E(B-V) | 0.052 | ||||||||
* 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.