All names: WISEA J164913.15+041148.2, PG 1646+043, UCAC4 471-057423, HIDDEN NAME PG 1646+042, Gaia DR3 4434404508777174784, GALEX J164913.1+041148, SDSS J164913.13+041148.1, 2MASS J16491312+0411482, WISE J164913.14+041148.0, TIC 271005714, PG1646+042, Gaia DR2 4434404508777174784, UCAC2 33241903
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 16 49 13.15 | 16 49 13.14 (0.03) | ||
| Declination | 04 11 48.45 | 04 11 48.19 (0.02) | ||
| Spectral type | sdB | sdB | ||
| Effective temperature | [K] | |||
| log(g) | [cgs] | |||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.47 (0.06) | 0.39 (0.04) | |
| Distance | [pc] | 2119.09 (278) | 2554.93 (290) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 2.258 (0.1) | 2.119 (0.05) | |
| Proper motion (declination) | [mas/yr] | -8.109 (0.08) | -8.049 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.56 (0.03) | |||
| V magnitude | 15.77 (0.01) | |||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 15.92 (0.08) | 15.92 (0.08) | ||
| H magnitude | 16.18 (0.2) | 16.18 (0.2) | ||
| K magnitude | 16.20 (0.3) | 16.20 (0.3) | ||
| u magnitude | 15.12 (0.004) | |||
| g magnitude | 15.38 (0.004) | |||
| r magnitude | 15.85 (0.004) | |||
| i magnitude | 16.16 (0.005) | |||
| z magnitude | 16.48 (0.008) | |||
| G magnitude | 15.63 (0.0007) | 15.61 (0.003) | ||
| BP magnitude | 15.41 (0.01) | |||
| RP magnitude | 15.83 (0.003) | |||
| Pan g magnitude | 15.47 (0.002) | |||
| Pan r magnitude | 15.85 (0.002) | |||
| Pan i magnitude | 16.19 (0.003) | |||
| Pan z magnitude | 16.44 (0.003) | |||
| Pan y magnitude | 16.61 (0.009) | |||
| E(B-V) | 0.085 | |||
* 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.