All names: Gaia DR2 1784210022709279616, Gaia DR3 1784210022709279616, SDSSJ213012.37+165355.0, GALEX J213012.3+165354, SDSS J213012.37+165355.0, SDSS J213012.37+165355.1, Gaia EDR3 1784210095720480384
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 21 30 19.52 (0.5) | 21 30 12.37 | 21 30 12.37 (0.04) | ||
| Declination | 16 54 04.63 (0.6) | 16 53 55.07 | 16 53 55.16 (0.04) | ||
| Spectral type | sd | sd+K | |||
| 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] | 4.10 (0.6) | 0.34 (0.06) | 0.42 (0.05) | |
| Distance | [pc] | 243.80 (34) | 2936.86 (515) | 2354.05 (272) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -19.568 (0.7) | 1.785 (0.1) | 1.613 (0.05) | |
| Proper motion (declination) | [mas/yr] | -5.585 (0.5) | -11.567 (0.1) | -11.791 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | |||||
| V magnitude | |||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 16.69 (0.1) | ||||
| H magnitude | 15.39 | ||||
| K magnitude | 15.67 | ||||
| u magnitude | 15.98 (0.005) | 15.98 (0.005) | |||
| g magnitude | 16.00 (0.003) | 16.00 (0.003) | |||
| r magnitude | 16.39 (0.004) | 16.39 (0.004) | |||
| i magnitude | 16.67 (0.005) | 16.67 (0.005) | |||
| z magnitude | 16.90 (0.01) | 16.90 (0.01) | |||
| G magnitude | 20.25 (0.006) | 16.24 (0.002) | 16.21 (0.003) | ||
| BP magnitude | 20.37 (0.08) | 16.11 (0.006) | |||
| RP magnitude | 19.92 (0.08) | 16.36 (0.005) | |||
| Pan g magnitude | 16.11 (0.002) | ||||
| Pan r magnitude | 16.42 (0.006) | ||||
| Pan i magnitude | 16.68 (0.004) | ||||
| Pan z magnitude | 16.89 (0.008) | ||||
| Pan y magnitude | 17.05 (0.01) | ||||
| E(B-V) | 0.070 | ||||
* 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.