All names: SDSS J122105.28+492720.4, WDS J12211+4927AB, 2MASS J12210535+4927207, Balloon 114041004, SDSS J122105.34+492720.5, LAMOST J122105.39+492720.6, WIRED J122105.34+492720.5, SDSS J122105.33+492720.5, LB 2318, GALEX J122105.3+492720, SDSS J122105.35+492720.6, Gaia DR3 1547120238763907584, Gaia DR2 1547120238763052160, Gaia EDR3 1547120238763907584, SDSS J122105.35+492720.5, TIC 165313386, SBSS 1218+497, WD 1218+497, [HHD2009] SDSS J1221+4927, PG 1218+497
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Bedard et al. 2020 | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Gianninas et al. 2011 | Tremblay et al. 2011 | Liebert et al. 2005 | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 12 21 05.27 (0.3) | 12 21 05.34 | 12 21 05.27 (0.3) | 12 21 05.34 | 12 21 05.36 (0.3) | 12 21 05.35 | 12 21 05.95 | 12 21 05.35 | |||||||
| Declination | 49 27 20.32 (0.3) | 49 27 20.52 | 49 27 20.33 (0.2) | 49 27 20.48 | 49 27 20.46 (0.3) | 49 27 20.52 | 49 27 09.72 | 49 27 20.54 | |||||||
| Spectral type | DA+M | DA+M | DA | DA | DA+dMe | DA+M | DA1 | DA+M | |||||||
| Effective temperature | [K] | 35487.0 (216) | 35740.0 (295) | 35810.0 (567) | 36440.0 (420) | 35660.0 (567) | 39937.0 (411) | 40095.0 (574) | |||||||
| log(g) | [cgs] | 7.87 (0.04) | 7.98 (0.06) | 7.99 (0.06) | 7.92 (0.06) | 7.87 (0.06) | 7.60 (0.04) | 7.54 (0.04) | |||||||
| Mass | [M☉] | 0.59 (0.02) | 0.65 (0.03) | 0.66 (0.03) | 0.62 (0.03) | 0.6 (0.03) | |||||||||
| log(Luminosity) | [L☉] | -0.50 (0.03) | -0.49 | ||||||||||||
| Cooling age | [Gyr] | 0.0052 (0.0001) | 0.0054 | 0.0058 | |||||||||||
| 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] | 7.36 (0.5) | 5.29 (0.4) | 7.36 (0.5) | |||||||||||
| Distance | [pc] | 135.79 (9) | 189.14 (15) | 867.00 (101) | 212.00 | 236.00 | 135.79 (9) | ||||||||
| Composition | H | H | H | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | -54.45615422 (0.3) | -61.68822578 (0.5) | -54.456 (0.3) | -58.1 | ||||||||||
| Proper motion (declination) | [mas/yr] | -8.920727203 (0.4) | -14.90766408 (0.5) | -8.921 (0.4) | -8.2 | ||||||||||
| Variability | |||||||||||||||
| Magnetic | |||||||||||||||
| Bd | [MG] | ||||||||||||||
| Infrared excess (disk) | |||||||||||||||
| Binarity | WDMS | WDMS | WDMS | ||||||||||||
| B magnitude | 16.12 | ||||||||||||||
| V magnitude | 16.24 | 16.24 | |||||||||||||
| R magnitude | |||||||||||||||
| I magnitude | |||||||||||||||
| J magnitude | 14.59 (0.04) | ||||||||||||||
| H magnitude | 14.00 (0.04) | ||||||||||||||
| K magnitude | 13.84 (0.06) | ||||||||||||||
| u magnitude | 15.81 (0.005) | 15.82 | 15.81 (0.005) | 15.82 (0.01) | 16.12 | 15.82 (0.01) | |||||||||
| g magnitude | 16.11 (0.004) | 16.13 | 16.11 (0.004) | 16.13 (0.01) | 16.12 | 16.12 (0.01) | |||||||||
| r magnitude | 16.47 (0.004) | 16.51 | 16.47 (0.004) | 16.51 (0.01) | 16.50 (0.01) | ||||||||||
| i magnitude | 16.25 (0.004) | 16.28 | 16.25 (0.004) | 16.28 (0.02) | 16.27 (0.02) | ||||||||||
| z magnitude | 15.89 (0.006) | 15.91 | 15.89 (0.006) | 15.91 (0.02) | 15.90 (0.02) | ||||||||||
| G magnitude | 16.41 (0.003) | 16.29 | 16.41 (0.004) | ||||||||||||
| BP magnitude | 16.19 (0.003) | 16.13 | |||||||||||||
| RP magnitude | 15.81 (0.002) | 15.80 | |||||||||||||
| Pan g magnitude | 16.20 (0.004) | ||||||||||||||
| Pan r magnitude | 16.48 (0.004) | ||||||||||||||
| Pan i magnitude | 16.24 (0.003) | ||||||||||||||
| Pan z magnitude | 15.95 (0.002) | ||||||||||||||
| Pan y magnitude | 15.75 (0.003) | ||||||||||||||
| E(B-V) | 0.009 | ||||||||||||||
* 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.