V* V470 Lyr

All names: V* V470 Lyr, EGGR 127, LTT 15569, LSPM J1857+3357, CSI+33-18557, UCAC2 43646082, Gaia DR3 2092134443120038528, L 1498-127, uvby98 980207009 V, PLX 4400.01, USNO-B1.0 1239-00306374, PM J18575+3357, UBV 16117, GEN# +6.20020127, WDJ185730.18+335725.78, L 1498-12, G207-9, LP 280-26, NLTT 47243, 2MASS J18573017+3357252, G 207-9, WD 1855+33, 18575+3357, UBV M 42686, Gaia DR2 2092134443120038528, WD 1855+338, Gaia EDR3 2092134443120038528, TIC 20609183, USNO 261, 1855+338, GEN# +9.80207009

Parameter Unit Gaia EDR3 Pan-STARRS DR1 O'Brien et al. 2024 McCleery et al. 2020 Leggett et al. 2018 MWDD H Gaia DR2 Bedard et al. 2017 Stilism Plachy 2016 Limoges et al. 2015 Gianninas et al. 2011 Bergeron et al. 2001 Robinson & McGraw 1976 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Research Corporation White Dwarf Catalog (McCook & Sion 1999)
Right ascension 18 57 30.23 (0.02) 18 57 30.23 (0.03) 18 57 30.23 (0.03) 18 57 30.23 18 57 30.18 (0.02) 18 57 30.23 18 57 30.22
Declination 33 57 31.42 (0.02) 33 57 31.24 (0.03) 33 57 31.24 (0.03) 33 57 31.42 33 57 25.78 (0.02) 33 57 31.24 33 57 10.80
Spectral type DA DA DA4.4 DA DA DA DA DA DA DA4.1 DAV DA5
Effective temperature [K] 11904.0 (140) 11906.2 (63) 11438.0 (430) 11824.0 12137.0 (184) 12080.0 12300.0 (186) 12390.0 (189) 11240.0 (430) 12080.0 11769.0 (61) 11950.0
log(g) [cgs] 8.33 (0.02) 8.34 (0.008) 8.32 (0.03) 8.33 8.33 (0.05) 8.37 8.31 (0.05) 8.42 (0.05) 8.19 (0.2) 8.37 8.33 (0.005) 8.35
Mass [M☉] 0.814 (0.01) 0.805 (0.03) 0.811 0.88 (0.3) 0.8 (0.03) 0.87 (0.03) 0.72 (0.1) 0.809 (0.005)
log(Luminosity) [L☉] -2.65 -2.73 (0.1)
Cooling age [Gyr] 0.6870 (0.08) 0.6382 0.5800 (0.2)
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] 32.94 (0.02) 32.94 (0.02) 32.88 (0.04) 33.49 (0.2) 32.88 (0.04) 30.50 (4) 30.50 (4) 32.94 32.94 (0.02) 32.88 (0.04) 30.00 (4)
Distance [pc] 30.36 (0.02) 30.36 (0.02) 30.41 (0.03) 29.86 (0.2) 30.41 (0.03) 32.80 (5) 32.80 (5) 30.00 32.79 (5) 30.36 30.36 (0.02) 30.41 (0.03) 33.33 (4)
Composition H H H H H
Proper motion (right ascension) [mas/yr] 42.40069612 (0.02) 42.41284109 (0.05) 42.401 (0.02) 42.41284109
Proper motion (declination) [mas/yr] 352.6404698 (0.02) 352.6863234 (0.06) 352.64 (0.02) 352.6863234
Variability VAR VAR VAR VAR
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 14.81 14.81
V magnitude 14.60 14.64 14.60 14.62
R magnitude 14.63 14.80
I magnitude 14.66
J magnitude 14.74 14.74 (0.03)
H magnitude 14.72 14.77 (0.06)
K magnitude 14.77 14.80 (0.1)
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 14.63 (0.002) 14.65 14.65 14.63 14.63 (0.003) 14.65
BP magnitude 14.65 (0.002) 14.65 14.65
RP magnitude 14.64 (0.001) 14.65 14.65
Pan g magnitude 14.57 (0.006)
Pan r magnitude 14.74 (0.01)
Pan i magnitude 14.96 (0.002)
Pan z magnitude 15.16 (0.002)
Pan y magnitude 15.28 (0.005)
E(B-V) 0.002
Period #1 [s] 129.4 259.1
Amplitude #1 [mma] 1.1
Period #2 [s] 196.1 292.0
Amplitude #2 [mma] 1.3
Period #3 [s] 290.9 318.0
Amplitude #3 [mma] 1.1
Period #4 [s] 291.9 557.4
Amplitude #4 [mma] 11
Period #5 [s] 292.9 738.6
Amplitude #5 [mma] 1.7
Period #6 [s] 305.2
Amplitude #6 [mma] 0.4
Period #7 [s] 317.8
Amplitude #7 [mma] 0.5
Period #8 [s] 595.7
Amplitude #8 [mma] 2.2
Period #9 [s] 599.8
Amplitude #9 [mma] 1.2
Period #10 [s] 623.8
Amplitude #10 [mma] 1.2
Period #11 [s] 626.8
Amplitude #11 [mma] 0.9

* 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.