All names: Gaia DR2 6897694220128108544, Gaia EDR3 6897694220128108544, GALEX J212306.3-081127, ** SKF 1775A, Gaia DR3 6897694220128108544, SDSS J212306.35-081127.1, SDSS J212306.34-081127.0, WD 2120-084, WDS J21231-0811A
| Parameter | Unit | Gaia EDR3 | SDSS DR12 | MWDD H | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Vincent et al. 2024 | Simbad | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 21 23 06.37 (0.09) | 21 23 06.34 | 21 23 06.37 (0.1) | 21 23 06.35 | 21 23 06.37 | 21 23 06.34 (0.09) | 21 23 05.98 | 21 23 06.35 | ||||
| Declination | -08 11 28.07 (0.07) | -08 11 27.05 | -08 11 28.04 (0.1) | -08 11 27.06 | -08 11 28.07 | -08 11 27.06 (0.07) | -08 11 25.08 | -08 11 27.06 | ||||
| Spectral type | DA+M | DA+M | DA | DA | DA2.9+M6 | DA+M | DA+MS | |||||
| Effective temperature | [K] | 13414.0 | 17304.0 (131) | 14074.0 (556) | 18940.0 (164) | |||||||
| log(g) | [cgs] | 7.66 | 7.77 (0.03) | 7.58 (0.05) | 7.74 (0.02) | |||||||
| Mass | [M☉] | 0.435 | 0.5 (0.01) | 0.401 (0.03) | ||||||||
| log(Luminosity) | [L☉] | |||||||||||
| Cooling age | [Gyr] | 0.1712 | ||||||||||
| log(H/He) | ||||||||||||
| log(C/He) | ||||||||||||
| log(Ca/He) | ||||||||||||
| log(Ca/H) | ||||||||||||
| log(C/H) | ||||||||||||
| log(N/H) | ||||||||||||
| log(O/H) | ||||||||||||
| log(Na/H) | ||||||||||||
| log(Mg/H) | ||||||||||||
| log(Al/H) | ||||||||||||
| log(Si/H) | ||||||||||||
| log(P/H) | ||||||||||||
| log(S/H) | ||||||||||||
| log(Sc/H) | ||||||||||||
| log(Ti/H) | ||||||||||||
| log(Cr/H) | ||||||||||||
| log(Mn/H) | ||||||||||||
| log(Fe/H) | ||||||||||||
| log(Ni/H) | ||||||||||||
| Parallax | [mas] | 5.36 (0.1) | 5.40 (0.2) | 5.36 | 5.36 (0.1) | |||||||
| Distance | [pc] | 186.69 (4) | 185.28 (6) | 208.00 (4) | 186.69 | 186.69 (4) | ||||||
| Composition | H | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 26.44632149 (0.1) | 26.75537949 (0.2) | 26.446 (0.1) | ||||||||
| Proper motion (declination) | [mas/yr] | -62.79507527 (0.08) | -62.79380477 (0.2) | -62.795 (0.08) | ||||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | WDMS | yes | WDMS | WDMS | ||||||||
| B magnitude | ||||||||||||
| V magnitude | ||||||||||||
| R magnitude | ||||||||||||
| I magnitude | ||||||||||||
| J magnitude | 15.49 (0.08) | |||||||||||
| H magnitude | 15.06 (0.1) | |||||||||||
| K magnitude | 14.45 (0.1) | |||||||||||
| u magnitude | 17.50 (0.01) | 17.48 | 17.50 (0.01) | 17.55 | 17.48 (0.02) | |||||||
| g magnitude | 17.16 (0.005) | 17.27 | 17.16 (0.005) | 17.33 | 17.27 (0.02) | |||||||
| r magnitude | 17.41 (0.005) | 17.51 | 17.41 (0.005) | 17.52 | 17.51 (0.01) | |||||||
| i magnitude | 17.56 (0.007) | 17.67 | 17.56 (0.007) | 17.65 | 17.67 (0.03) | |||||||
| z magnitude | 17.77 (0.02) | 17.82 | 17.77 (0.02) | 17.88 | 17.82 (0.08) | |||||||
| G magnitude | 17.35 (0.009) | 17.38 | 17.35 | 17.35 (0.003) | ||||||||
| BP magnitude | 17.28 (0.009) | 17.26 | ||||||||||
| RP magnitude | 16.85 (0.02) | 16.83 | ||||||||||
| Pan g magnitude | ||||||||||||
| Pan r magnitude | ||||||||||||
| Pan i magnitude | ||||||||||||
| Pan z magnitude | ||||||||||||
| Pan y magnitude | ||||||||||||
| E(B-V) | 0.013 | |||||||||||
* 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.