All names: 2MASS J17283185+6204265, SDSS J172831.84+620426.7, WD 1728+621, SDSS J172831.83+620426.4, [SGR2010] J1728+6204, Gaia EDR3 1439242853695513984, [HHD2009] SDSS J1728+6204, Gaia DR3 1439242853695513984, Gaia DR2 1439242853695513984, TIC 219758871, SDSS J172831.84+620426.5, GALEX J172831.8+620426, WIRED J172831.83+620426.4
| 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 | 17 28 31.85 (0.2) | 17 28 31.84 | 17 28 31.85 (0.2) | 17 28 31.83 | 17 28 31.84 (0.2) | 17 28 31.84 | 17 28 30.86 | 17 28 31.84 | |||
| Declination | 62 04 26.45 (0.2) | 62 04 26.49 | 62 04 26.45 (0.2) | 62 04 26.40 | 62 04 26.49 (0.2) | 62 04 26.52 | 62 04 23.88 | 62 04 26.49 | |||
| Spectral type | DA+M | DA+dMe | DA+M | DA+ME | DAH:M | ||||||
| Effective temperature | [K] | 20806.0 (1744) | 6300.0 (1) | 6300.0 (3) | |||||||
| log(g) | [cgs] | 8.47 (0.3) | 8.66 (0.1) | 10.00 (0.003) | |||||||
| Mass | [M☉] | 0.91 (0.2) | |||||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | ||||||||||
| log(H/He) | |||||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| Parallax | [mas] | 1.61 (0.2) | 2.17 (0.2) | 1.61 (0.2) | |||||||
| Distance | [pc] | 620.64 (64) | 461.61 (48) | 905.00 (163) | 620.66 (64) | ||||||
| Composition | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 1.809107725 (0.2) | 2.962413381 (0.5) | 1.809 (0.2) | 4.1 | ||||||
| Proper motion (declination) | [mas/yr] | -2.800718383 (0.2) | -3.469601895 (0.5) | -2.801 (0.2) | -5.1 | ||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | WDMS | WDMS | |||||||||
| B magnitude | |||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | 15.47 (0.06) | ||||||||||
| H magnitude | 14.82 (0.08) | ||||||||||
| K magnitude | 14.51 (0.1) | ||||||||||
| u magnitude | 19.32 (0.03) | 19.32 | 19.31 (0.03) | 19.32 (0.03) | 19.34 | 19.34 (0.03) | |||||
| g magnitude | 18.89 (0.009) | 18.88 | 18.88 (0.009) | 18.88 (0.02) | 18.88 | 18.88 (0.02) | |||||
| r magnitude | 18.22 (0.008) | 18.20 | 18.21 (0.008) | 18.20 (0.02) | 18.21 | 18.21 (0.02) | |||||
| i magnitude | 17.32 (0.006) | 17.30 | 17.32 (0.006) | 17.30 (0.01) | 17.32 | 17.32 (0.01) | |||||
| z magnitude | 16.76 (0.01) | 16.75 | 16.75 (0.01) | 16.75 (0.02) | 16.74 | 16.75 (0.02) | |||||
| G magnitude | 17.90 (0.02) | 17.89 | 17.90 (0.004) | ||||||||
| BP magnitude | 18.64 (0.02) | 18.66 | |||||||||
| RP magnitude | 16.88 (0.004) | 16.88 | |||||||||
| Pan g magnitude | 18.81 (0.01) | ||||||||||
| Pan r magnitude | 18.21 (0.009) | ||||||||||
| Pan i magnitude | 17.32 (0.004) | ||||||||||
| Pan z magnitude | 16.85 (0.005) | ||||||||||
| Pan y magnitude | 16.64 (0.009) | ||||||||||
| E(B-V) | 0.025 | ||||||||||
* 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.