All names: SDSS J184412.59+412029.5, SDSS J184412.58+412029.7, TIC 336077843, Gaia DR2 2098661762613244160, Gaia EDR3 2098661762613244160, WD 1842+412, SDSS J184412.58+412029.4, SBC9 3397, WIRED J184412.58+412029.4, [SGR2010] J1844+4120, 2MASS J18441262+4120293, Gaia DR3 2098661762613244160
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Simbad | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 18 44 12.51 (0.03) | 18 44 12.59 | 18 44 12.51 (0.03) | 18 44 12.59 | 18 44 12.63 (0.03) | 18 44 12.12 | 18 44 12.59 | |||
| Declination | 41 20 29.46 (0.03) | 41 20 29.45 | 41 20 29.46 (0.03) | 41 20 29.47 | 41 20 29.43 (0.03) | 41 20 26.52 | 41 20 29.46 | |||
| Spectral type | DA+M | DA+M6 | DA6.7+M6 | DA+M | ||||||
| Effective temperature | [K] | 7554.0 (6) | 6625.0 (16) | |||||||
| log(g) | [cgs] | 7.49 (0.06) | 5.00 (0.009) | |||||||
| Mass | [M☉] | 0.34 (0.02) | ||||||||
| log(Luminosity) | [L☉] | |||||||||
| Cooling age | [Gyr] | |||||||||
| log(H/He) | ||||||||||
| log(C/He) | ||||||||||
| log(Ca/He) | ||||||||||
| log(Ca/H) | ||||||||||
| Parallax | [mas] | 15.46 (0.03) | 15.45 (0.03) | 15.46 (0.03) | ||||||
| Distance | [pc] | 64.70 (0.1) | 64.72 (0.1) | 73.00 (2) | 64.70 (0.1) | |||||
| Composition | ||||||||||
| Proper motion (right ascension) | [mas/yr] | -85.38442187 (0.04) | -85.46010693 (0.07) | -85.384 (0.04) | ||||||
| Proper motion (declination) | [mas/yr] | 2.328753115 (0.04) | 2.366235375 (0.07) | 2.329 (0.04) | ||||||
| Variability | ||||||||||
| Magnetic | ||||||||||
| Bd | [MG] | |||||||||
| Infrared excess (disk) | ||||||||||
| Binarity | WDMS | yes | WDMS | |||||||
| B magnitude | ||||||||||
| V magnitude | ||||||||||
| R magnitude | ||||||||||
| I magnitude | ||||||||||
| J magnitude | 13.39 (0.03) | |||||||||
| H magnitude | 12.86 (0.03) | |||||||||
| K magnitude | 12.62 (0.03) | |||||||||
| u magnitude | 17.25 (0.009) | 17.26 | 17.25 (0.009) | 17.25 | 17.26 (0.02) | |||||
| g magnitude | 16.70 (0.004) | 16.71 | 16.70 (0.004) | 16.70 | 16.71 (0.01) | |||||
| r magnitude | 16.44 (0.005) | 16.43 | 16.43 (0.005) | 16.44 | 16.43 (0.01) | |||||
| i magnitude | 15.69 (0.005) | 15.69 | 15.69 (0.005) | 15.69 | 15.69 (0.01) | |||||
| z magnitude | 14.94 (0.006) | 14.93 | 14.93 (0.005) | 14.93 | 14.93 (0.01) | |||||
| G magnitude | 16.04 (0.004) | 16.05 | 16.04 (0.003) | |||||||
| BP magnitude | 16.66 (0.004) | 16.66 | ||||||||
| RP magnitude | 15.15 (0.003) | 15.15 | ||||||||
| Pan g magnitude | 16.69 (0.003) | |||||||||
| Pan r magnitude | 16.45 (0.003) | |||||||||
| Pan i magnitude | 15.71 (0.002) | |||||||||
| Pan z magnitude | 15.07 (0.003) | |||||||||
| Pan y magnitude | 14.71 (0.003) | |||||||||
| E(B-V) | 0.010 | |||||||||
* 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.