All names: SDSS J172800.96+310318.1, Gaia DR3 4600028450690996352, Gaia EDR3 4600028450690996352, SDSS J172800.96+310318.18, Gaia DR2 4600028450690996352, SDSS J172800.96+310318.2, GALEX J172800.9+310318, TIC 39322359, SDSSJ172800.96+310318.1, 2MASS J17280094+3103183
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | Geier 2020 | Gaia DR2 | Stilism | Kepler et al. 2015 | Simbad |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 17 28 00.96 (0.04) | 17 28 00.96 | 17 28 00.96 | 17 28 00.96 (0.06) | 17 28 00.96 (0.04) | ||||
| Declination | 31 03 18.18 (0.05) | 31 03 18.21 | 31 03 18.10 | 31 03 18.18 (0.06) | 31 03 18.22 (0.05) | ||||
| Spectral type | sdB | sdB | sdB | ||||||
| Effective temperature | [K] | 31111.0 (77) | |||||||
| log(g) | [cgs] | 5.00 (0.05) | |||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.22 (0.05) | 0.12 (0.07) | 0.12 (0.07) | 0.22 (0.05) | ||||
| Distance | [pc] | 4581.33 (1152) | 8554.32 (5430) | 8554.00 (5427) | 4580.85 (1152) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | -1.09998023 (0.06) | -1.02 (0.1) | -1.019658693 (0.1) | -1.1 (0.06) | ||||
| Proper motion (declination) | [mas/yr] | -2.613969459 (0.06) | -2.722 (0.1) | -2.722112285 (0.1) | -2.614 (0.06) | ||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | |||||||||
| V magnitude | |||||||||
| R magnitude | |||||||||
| I magnitude | |||||||||
| J magnitude | 16.58 (0.1) | 16.58 (0.1) | |||||||
| H magnitude | 16.19 (0.2) | 16.19 (0.2) | |||||||
| K magnitude | 15.67 | ||||||||
| u magnitude | 17.18 (0.009) | 17.18 (0.009) | 17.18 (0.03) | 17.18 (0.009) | |||||
| g magnitude | 17.08 (0.004) | 17.08 (0.004) | 17.11 (0.01) | 17.08 (0.004) | |||||
| r magnitude | 17.13 (0.005) | 17.13 (0.005) | 17.17 (0.01) | 17.20 (0.005) | |||||
| i magnitude | 17.25 (0.006) | 17.25 (0.006) | 17.27 (0.02) | 17.26 (0.006) | |||||
| z magnitude | 17.28 (0.01) | 17.28 (0.01) | 17.29 (0.02) | 17.30 (0.01) | |||||
| G magnitude | 17.07 (0.005) | 17.10 (0.001) | 17.10 | 17.07 (0.003) | |||||
| BP magnitude | 17.13 (0.005) | 17.11 (0.01) | 17.11 | ||||||
| RP magnitude | 16.93 (0.006) | 16.93 (0.006) | 16.93 | ||||||
| Pan g magnitude | 17.10 (0.004) | 17.10 (0.004) | |||||||
| Pan r magnitude | 17.20 (0.003) | 17.20 (0.003) | |||||||
| Pan i magnitude | 17.26 (0.004) | 17.26 (0.004) | |||||||
| Pan z magnitude | 17.31 (0.005) | 17.31 (0.005) | |||||||
| Pan y magnitude | 17.33 (0.01) | 17.33 (0.01) | |||||||
| E(B-V) | 0.028 | ||||||||
* 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.