All names: 2MASS J21561457-0002374, SDSS J215614.56-000237.4, GALEX J215614.5-000237, SBC9 3405, Gaia DR3 2680204281563102080, SDSS J215614.57-000237.3, SDSS J215614.57-000237.4, LAMOST J215614.57-000237.4, TIC 241161060, [HHD2009] SDSS J2156-0002, WD 2153-002, Gaia EDR3 2680204281563102080, [SGR2010] J2156-0002, Gaia DR2 2680204281563102080
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 21 56 14.62 (0.3) | 21 56 14.58 | 21 56 14.62 (0.5) | 21 56 14.57 | 21 56 14.57 (0.3) | 21 56 14.58 | 21 56 13.87 | 21 56 14.57 | |||
| Declination | -00 02 37.44 (0.3) | -00 02 37.43 | -00 02 37.44 (0.5) | -00 02 37.39 | -00 02 37.45 (0.3) | -00 02 37.40 | -00 02 31.20 | -00 02 37.43 | |||
| Spectral type | DA:+M | DA+? | WD:+M | WD: dM | DA:M | ||||||
| Effective temperature | [K] | 6300.0 (1) | 6300.0 (3) | ||||||||
| log(g) | [cgs] | 8.79 (0.1) | 10.00 (0.003) | ||||||||
| Mass | [M☉] | ||||||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | ||||||||||
| log(H/He) | |||||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| Parallax | [mas] | 3.05 (0.4) | 3.35 (0.5) | 3.05 (0.4) | |||||||
| Distance | [pc] | 327.57 (38) | 298.53 (48) | 354.00 (63) | 327.58 (38) | ||||||
| Composition | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 45.47534574 (0.4) | 45.84847215 (0.7) | 45.475 (0.4) | 46.5 | ||||||
| Proper motion (declination) | [mas/yr] | 0.514070968 (0.3) | 0.663348489 (0.8) | 0.514 (0.3) | 1.5 | ||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | WDMS | WDMS | |||||||||
| B magnitude | |||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | 15.65 (0.008) | ||||||||||
| H magnitude | 15.05 (0.009) | ||||||||||
| K magnitude | 14.72 (0.009) | ||||||||||
| u magnitude | 20.95 (0.07) | 20.76 | 20.75 (0.07) | 20.76 (0.07) | 20.76 | 20.77 (0.07) | |||||
| g magnitude | 20.23 (0.02) | 20.14 | 20.12 (0.02) | 20.14 (0.02) | 20.14 | 20.14 (0.02) | |||||
| r magnitude | 19.57 (0.02) | 19.56 | 19.56 (0.01) | 19.56 (0.02) | 19.56 | 19.55 (0.02) | |||||
| i magnitude | 18.33 (0.009) | 18.30 | 18.28 (0.009) | 18.30 (0.02) | 18.30 | 18.28 (0.02) | |||||
| z magnitude | 17.29 (0.01) | 17.31 | 17.31 (0.01) | 17.31 (0.02) | 17.31 | 17.31 (0.02) | |||||
| G magnitude | 18.86 (0.07) | 18.89 | 18.86 (0.004) | ||||||||
| BP magnitude | 20.06 (0.07) | 20.19 | |||||||||
| RP magnitude | 17.75 (0.01) | 17.74 | |||||||||
| Pan g magnitude | 20.10 (0.01) | ||||||||||
| Pan r magnitude | 19.54 (0.01) | ||||||||||
| Pan i magnitude | 18.32 (0.005) | ||||||||||
| Pan z magnitude | 17.51 (0.006) | ||||||||||
| Pan y magnitude | 17.05 (0.009) | ||||||||||
| E(B-V) | 0.095 | ||||||||||
* 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.