SDSS J170857.16+232858.1

All names: SDSS J170857.17+232858.1, Gaia DR2 4571722241092468480, SDSS J170857.17+232858.15, GALEX J170857.2+232856, Gaia EDR3 4571722241092468480, SDSS J170857.16+232858.1, Gaia DR3 4571722241092468480

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR10 Hardy et al. 2023a MWDD H Gaia DR2 Stilism Kepler et al. 2015 Vincent et al. 2024 Simbad Vincent et al. 2023
Right ascension 17 08 57.16 (0.1) 17 08 57.16 17 08 57.16 (0.1) 17 08 57.16 17 08 57.16 (0.1)
Declination 23 28 58.10 (0.1) 23 28 58.11 23 28 58.10 (0.2) 23 28 58.10 23 28 58.07 (0.1)
Spectral type DA DAH DAH DA DAH DA
Effective temperature [K] 17895.6 (348) 15514.0 19444.0 (210) 19437.0 (1209)
log(g) [cgs] 8.25 (0.7) 8.12 8.26 (0.04) 8.27 (0.08)
Mass [M] 0.7729487974460143 (0.8) 0.688 0.787 (0.06)
log(Luminosity) [L]
Cooling age [Gyr] 0.2170
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
log(C/H)
log(N/H)
log(O/H)
log(Na/H)
log(Mg/H)
log(Al/H)
log(Si/H)
log(P/H)
log(S/H)
log(Sc/H)
log(Ti/H)
log(Cr/H)
log(Mn/H)
log(Fe/H)
log(Ni/H)
Parallax [mas] 3.03 (0.2) 3.19 (0.2) 3.03 3.03 (0.2)
Distance [pc] 329.85 (18) 313.90 (23) 329.85 329.85 (18)
Composition H
Proper motion (right ascension) [mas/yr] 1.336368301 (0.1) 1.347431197 (0.3) 1.336 (0.1)
Proper motion (declination) [mas/yr] 1.634354563 (0.2) 1.221933574 (0.3) 1.634 (0.2)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.91 (0.02) 18.93 (0.03) 18.91 (0.02)
g magnitude 18.75 (0.008) 18.78 (0.02) 18.75 (0.008)
r magnitude 19.10 (0.01) 19.12 (0.02) 19.10 (0.01)
i magnitude 19.34 (0.02) 19.34 (0.02) 19.34 (0.02)
z magnitude 19.65 (0.07) 19.64 (0.07) 19.65 (0.07)
G magnitude 18.93 (0.02) 18.97 18.93 18.93 (0.003)
BP magnitude 18.87 (0.02) 18.86
RP magnitude 19.10 (0.03) 19.05
Pan g magnitude 18.78 (0.004)
Pan r magnitude 19.08 (0.006)
Pan i magnitude 19.34 (0.01)
Pan z magnitude 19.59 (0.02)
Pan y magnitude 19.74 (0.09)
E(B-V) 0.028

* Constant surface field

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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.