All names: Gaia DR2 816776889914225280, US 2262, WIRED J090409.05+422702.2, WD 0900+426, Gaia EDR3 816776889914225280, SDSS J090409.05+422702.2, Gaia DR3 816776889914225280, SDSS J090409.06+422702.2, SDSS J090409.06+422702.3, 2MASS J09040905+4227022, [HHD2009] SDSS J0904+4227, TIC 99236397
| 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 | 09 04 09.05 (0.1) | 09 04 09.05 | 09 04 09.05 (0.2) | 09 04 09.05 | 09 04 09.06 (0.1) | 09 04 09.06 | 09 04 08.62 | 09 04 09.06 | |||
| Declination | 42 27 02.14 (0.1) | 42 27 02.18 | 42 27 02.14 (0.1) | 42 27 02.20 | 42 27 02.22 (0.1) | 42 27 02.26 | 42 26 57.84 | 42 27 02.26 | |||
| Spectral type | DA+M | DA+dM | DA+M | DA d | DA+M | ||||||
| Effective temperature | [K] | 25891.0 (1429) | 6301.0 (3) | 6300.0 (2) | |||||||
| log(g) | [cgs] | 7.90 (0.2) | 7.20 (0.2) | 6.15 (0.2) | |||||||
| Mass | [M☉] | 0.58 (0.1) | |||||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | ||||||||||
| log(H/He) | |||||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| Parallax | [mas] | 1.30 (0.2) | 1.20 (0.3) | 1.30 (0.2) | |||||||
| Distance | [pc] | 767.09 (115) | 833.98 (174) | 644.00 (77) | 767.11 (115) | ||||||
| Composition | |||||||||||
| Proper motion (right ascension) | [mas/yr] | -4.181174224 (0.2) | -4.628683355 (0.4) | -4.181 (0.2) | -0.7 | ||||||
| Proper motion (declination) | [mas/yr] | -4.972094381 (0.2) | -4.933300271 (0.3) | -4.972 (0.2) | -4.0 | ||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | WDMS | WDMS | WDMS | ||||||||
| B magnitude | 19.80 | ||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | 16.64 (0.1) | ||||||||||
| H magnitude | 15.99 (0.1) | ||||||||||
| K magnitude | 15.55 (0.2) | ||||||||||
| u magnitude | 19.31 (0.03) | 19.34 | 19.34 (0.03) | 19.34 (0.04) | 19.34 | 19.33 (0.03) | |||||
| g magnitude | 19.15 (0.01) | 19.16 | 19.16 (0.01) | 19.16 (0.01) | 19.16 | 19.15 (0.02) | |||||
| r magnitude | 18.89 (0.01) | 18.89 | 18.90 (0.01) | 18.89 (0.02) | 18.89 | 18.88 (0.02) | |||||
| i magnitude | 18.20 (0.009) | 18.22 | 18.21 (0.009) | 18.21 (0.02) | 18.22 | 18.21 (0.02) | |||||
| z magnitude | 17.69 (0.02) | 17.68 | 17.69 (0.02) | 17.68 (0.03) | 17.68 | 17.68 (0.02) | |||||
| G magnitude | 18.59 (0.02) | 18.62 | 18.59 (0.003) | ||||||||
| BP magnitude | 19.16 (0.02) | 19.13 | |||||||||
| RP magnitude | 17.79 (0.02) | 17.79 | |||||||||
| Pan g magnitude | 19.14 (0.02) | ||||||||||
| Pan r magnitude | 18.93 (0.02) | ||||||||||
| Pan i magnitude | 18.26 (0.005) | ||||||||||
| Pan z magnitude | 17.83 (0.01) | ||||||||||
| Pan y magnitude | 17.60 (0.01) | ||||||||||
| 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.