All names: GALEX J165816.5+270132, Gaia DR3 1306739646577338368, WISE J165816.53+270132.0, PG1656+271, UCAC4 586-055920, Gaia EDR3 1306739646577338368, WISEA J165816.52+270132.0, SDSS J165816.53+270132.1, PG 1656+271, TIC 236742743, SDSS J165816.53+270132.0, LB 974, SDSS J165816.53+270132.12, Gaia DR2 1306739646577338368, 2MASS J16581654+2701321
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | Geier 2020 | Gaia DR2 | Stilism | Kepler et al. 2015 | Simbad |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 16 58 16.52 (0.03) | 16 58 16.53 | 16 58 16.57 | 16 58 16.52 (0.04) | 16 58 16.53 (0.03) | ||||
| Declination | 27 01 32.04 (0.03) | 27 01 32.07 | 27 01 32.26 | 27 01 32.04 (0.04) | 27 01 32.08 (0.03) | ||||
| Spectral type | sdB | A/DAZ | sdB | ||||||
| Effective temperature | [K] | 33530.0 (92) | |||||||
| log(g) | [cgs] | 5.62 (0.02) | |||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.43 (0.04) | 0.49 (0.05) | 0.49 (0.05) | 0.43 (0.04) | ||||
| Distance | [pc] | 2316.48 (221) | 2046.66 (228) | 2046.60 (228) | 2316.42 (221) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | -11.22259532 (0.04) | -10.852 (0.08) | -10.85152315 (0.08) | -11.223 (0.04) | ||||
| Proper motion (declination) | [mas/yr] | -2.129997257 (0.04) | -1.962 (0.1) | -1.961781295 (0.1) | -2.13 (0.04) | ||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | 16.20 (0.05) | ||||||||
| V magnitude | 16.41 (0.01) | ||||||||
| R magnitude | 15.61 (0.6) | ||||||||
| I magnitude | |||||||||
| J magnitude | 15.79 (0.07) | 15.79 (0.07) | |||||||
| H magnitude | 15.52 (0.1) | 15.52 (0.1) | |||||||
| K magnitude | 15.27 (0.2) | 15.27 (0.2) | |||||||
| u magnitude | 16.02 (0.005) | 16.02 (0.005) | 16.04 (0.02) | 16.02 (0.005) | |||||
| g magnitude | 16.05 (0.004) | 16.05 (0.004) | 16.06 (0.01) | 16.05 (0.004) | |||||
| r magnitude | 16.34 (0.004) | 16.34 (0.004) | 16.33 (0.01) | 16.34 (0.004) | |||||
| i magnitude | 16.48 (0.005) | 16.48 (0.005) | 16.49 (0.02) | 16.48 (0.005) | |||||
| z magnitude | 16.55 (0.009) | 16.55 (0.009) | 16.56 (0.02) | 16.55 (0.009) | |||||
| G magnitude | 16.14 (0.002) | 16.17 (0.001) | 16.17 | 16.14 (0.003) | |||||
| BP magnitude | 16.13 (0.002) | 16.08 (0.006) | 16.08 | ||||||
| RP magnitude | 16.13 (0.004) | 16.13 (0.003) | 16.13 | ||||||
| Pan g magnitude | 16.11 (0.007) | 16.11 (0.007) | |||||||
| Pan r magnitude | 16.35 (0.005) | 16.35 (0.005) | |||||||
| Pan i magnitude | 16.49 (0.005) | 16.49 (0.005) | |||||||
| Pan z magnitude | 16.57 (0.005) | 16.57 (0.005) | |||||||
| Pan y magnitude | 16.63 (0.005) | 16.63 (0.005) | |||||||
| E(B-V) | 0.029 | ||||||||
* 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.