All names: [HHD2009] SDSS J1521+4201, Gaia DR2 1392381328817920640, SDSS J152116.97+420159.2, WIRED J152116.97+420159.2, Gaia DR3 1392381328817920640, TIC 116362798, SDSS J152116.98+420159.3, WD 1519+422, [SGR2010] J1521+4201, 2MASS J15211698+4201592, SDSS J152116.97+420159.3, Gaia EDR3 1392381328817920640
| 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 | 15 21 16.96 (0.09) | 15 21 16.97 | 15 21 16.96 (0.1) | 15 21 16.97 | 15 21 16.98 (0.09) | 15 21 16.44 | 15 21 16.98 | |||
| Declination | 42 01 59.62 (0.09) | 42 01 59.28 | 42 01 59.60 (0.1) | 42 01 59.20 | 42 01 59.23 (0.09) | 42 01 53.40 | 42 01 59.28 | |||
| Spectral type | DA+M | DA+M2 | DA1.5 | DA+M | ||||||
| Effective temperature | [K] | 33354.0 (879) | 6300.0 (2) | |||||||
| log(g) | [cgs] | 7.58 (0.2) | 5.03 (0.04) | |||||||
| Mass | [M☉] | 0.47 (0.07) | ||||||||
| log(Luminosity) | [L☉] | |||||||||
| Cooling age | [Gyr] | |||||||||
| log(H/He) | ||||||||||
| log(C/He) | ||||||||||
| log(Ca/He) | ||||||||||
| log(Ca/H) | ||||||||||
| Parallax | [mas] | 1.24 (0.1) | 1.16 (0.1) | 1.25 (0.1) | ||||||
| Distance | [pc] | 803.23 (74) | 865.56 (94) | 803.21 (74) | ||||||
| Composition | ||||||||||
| Proper motion (right ascension) | [mas/yr] | -13.04995993 (0.1) | -13.07243649 (0.2) | -13.05 (0.1) | ||||||
| Proper motion (declination) | [mas/yr] | 24.11663002 (0.1) | 24.17216917 (0.2) | 24.117 (0.1) | ||||||
| Variability | ||||||||||
| Magnetic | ||||||||||
| Bd | [MG] | |||||||||
| Infrared excess (disk) | ||||||||||
| Binarity | WDMS | yes | WDMS | |||||||
| B magnitude | ||||||||||
| V magnitude | ||||||||||
| R magnitude | ||||||||||
| I magnitude | ||||||||||
| J magnitude | 16.19 (0.09) | |||||||||
| H magnitude | 15.47 (0.08) | |||||||||
| K magnitude | 15.21 (0.2) | |||||||||
| u magnitude | 18.91 (0.02) | 18.95 | 18.94 (0.02) | 18.94 | 18.93 (0.03) | |||||
| g magnitude | 18.84 (0.009) | 18.85 | 18.84 (0.009) | 18.85 | 18.83 (0.02) | |||||
| r magnitude | 18.50 (0.008) | 18.51 | 18.50 (0.009) | 18.50 | 18.50 (0.02) | |||||
| i magnitude | 17.88 (0.008) | 17.89 | 17.88 (0.008) | 17.89 | 17.89 (0.02) | |||||
| z magnitude | 17.46 (0.02) | 17.46 | 17.46 (0.02) | 17.45 | 17.44 (0.03) | |||||
| G magnitude | 18.22 (0.02) | 18.23 | 18.22 (0.003) | |||||||
| BP magnitude | 18.69 (0.02) | 18.74 | ||||||||
| RP magnitude | 17.45 (0.01) | 17.46 | ||||||||
| Pan g magnitude | 18.83 (0.005) | |||||||||
| Pan r magnitude | 18.49 (0.006) | |||||||||
| Pan i magnitude | 17.86 (0.007) | |||||||||
| Pan z magnitude | 17.50 (0.01) | |||||||||
| Pan y magnitude | 17.29 (0.009) | |||||||||
| E(B-V) | 0.023 | |||||||||
* 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.