GD 244

All names: KUV 22543+1237, LP 521-49, GCRV 21700, Gaia DR3 2719012579552367488, SDSS J225646.18+125250.4, NPM1+12.2001, SDSS J225646.17+125250.3, WDJ225646.15+125250.31, GALEX J225646.1+125250, J2256+1252, GD 244, PG 2354+126, NLTT 55343, V* V394 Peg, 2MASS J22564613+1252501, LSPM J2256+1252, TIC 217329125, Gaia DR2 2719012579552367488, WD 2354+126, WD2254+126, USNO-B1.0 1028-00776554, WD 2254+126, EGGR 231, Gaia EDR3 2719012579552367488

Parameter Unit Gaia EDR3 Pan-STARRS DR1 Kilic et al. 2025 Kilic et al. 2020 MWDD H Gaia DR2 Stilism Gianninas et al. 2011 Koester et al. 2009 Yeates et al. 2005 Fontaine et al. 2001 Koester et al. 2001 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Research Corporation White Dwarf Catalog (McCook & Sion 1999)
Right ascension 22 56 46.36 (0.04) 22 56 46.35 (0.06) 22 56 46.30 22 56 46.36 22 56 46.15 (0.04) 22 56 46.35 22 56 45.58
Declination 12 52 50.45 (0.03) 12 52 50.45 (0.06) 12 52 50.00 12 52 50.45 12 52 50.31 (0.03) 12 52 50.45 12 52 50.88
Spectral type DA DA DA DA DA DA DA4.2 DAV DA
Effective temperature [K] 11371.0 (120) 11371.0 (120) 11283.0 12060.0 (185) 11707.0 (23) 11760.0 11760.0 11293.0 (29) 11537.0 (107) 11680.0
log(g) [cgs] 7.98 (0.01) 7.98 (0.01) 7.97 8.15 (0.05) 7.99 (0.009) 8.09 8.09 8.21 (0.03) 8.01 (0.01) 8.08
Mass [M☉] 0.593 (0.009) 0.593 (0.009) 0.588 0.7 (0.03) 0.74 0.608 (0.008)
log(Luminosity) [L☉]
Cooling age [Gyr] 0.4237
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] 15.98 (0.04) 15.98 (0.08) 15.98 15.98 (0.04) 15.98 (0.08)
Distance [pc] 62.57 (0.2) 62.60 (0.3) 75.00 62.57 62.57 (0.2) 62.60 (0.3)
Composition H H H
Proper motion (right ascension) [mas/yr] 189.5992605 (0.04) 189.5999451 (0.1) 189.599 (0.04) 189.5999451
Proper motion (declination) [mas/yr] 8.911603637 (0.04) 9.01463016 (0.09) 8.912 (0.04) 9.01463016
Variability VAR VAR VAR VAR
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 16.00 16.00 16.00
V magnitude 15.60 15.60 16.00
R magnitude 15.60
I magnitude
J magnitude 15.89 (0.07)
H magnitude 15.83 (0.2)
K magnitude
u magnitude 16.11 (0.005) 16.11 (0.005)
g magnitude 15.65 (0.004) 15.65 (0.004)
r magnitude 15.84 (0.004) 15.84 (0.004)
i magnitude 16.02 (0.005) 16.02 (0.005)
z magnitude 16.27 (0.008) 16.27 (0.008)
G magnitude 15.76 (0.005) 15.78 15.76 15.76 (0.003) 15.78
BP magnitude 15.78 (0.005) 15.77 15.77
RP magnitude 15.76 (0.004) 15.77 15.77
Pan g magnitude 15.71 (0.01)
Pan r magnitude 15.86 (0.004)
Pan i magnitude 16.07 (0.003)
Pan z magnitude 16.27 (0.008)
Pan y magnitude 16.41 (0.006)
E(B-V) 0.005
Period #1 [s] 203.0 307.0
Amplitude #1 [mma] 4
Period #2 [s] 256.2 294.6
Amplitude #2 [mma] 6.7
Period #3 [s] 256.6 256.3
Amplitude #3 [mma] 12.3
Period #4 [s] 306.6 203.3
Amplitude #4 [mma] 5
Period #5 [s] 307.1
Amplitude #5 [mma] 20.2
Period #6 [s] 906.1
Amplitude #6 [mma] 1.7

* Constant surface field

Special notes:

Spectra

Controls

Normalize at:
Normalize by mean flux

Range:

x: to
y: to

Spectra available:

Spectra without link are available upon request

Absorption lines

Photometric filters

BVRI
ugriz

Photometric fit




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.