EF Boo

Simbad link EF Boo
Source publication Gazeas, K. D. (2005) - Physical Parameters of Components in Close Binary Systems: IV
ADS link 2005AcA....55..123G
Name in Source publication EF Boo
Orbital period in days (P [d]) 0.420514
Mass ratio (q) 0.53
Mass ratio determination Spectroscopic
Type W
Has total eclipse?
Has spots?
Has third light?
Has period variation?

Solver WD
Orbital period in days (P [d]) 0.420514
Mass ratio (q) 0.53
Orbital inclination in degrees (i [o]) 75.7
Fillout (f) 0.25
Primary temperature in Kelvins (T1 [K]) 6425
Secondary temperature in Kelvins (T2 [K]) 6450
Primary polar radius in units of orbital separation (r1p) 0.4219
Secondary polar radius in units of orbital separation (r2p) 0.3186
Surface potential (Ω) 2.8629

Orbital separation in solar radii (a [R]) 3.14
Primary radius in solar units (R1 [R]) 1.43
Secondary radius in solar units (R2 [R]) 1.06
Primary mass in solar units (M1 [M]) 1.55
Secondary mass in solar units (M2 [M]) 0.79
Primary temperature in kelvins (T1 [K]) 6425
Secondary temperature in Kelvins (T2 [K]) 6450
Primary luminosity in solar units (L1 [L]) 3.08
Secondary luminosity in solar units (L2 [L]) 1.73
Distance in parsecs (d [pc])
Age in gigayears (τ [gyr]) 2.71

Orbital period in days (P [d]) 0.420514
Monotonic period variation in seconds per year (dPdt [s/y]) 0.022663
Cyclic period variation in years (Pc [y])
Period study Yu, Yun-Xia (2017) - Orbital period variations of two W UMa-type binaries: UY UMa and EF Boo
ADS link 2017NewA...55...13Y

Designation Gaia DR2 1603817861516048640
RA 218:07:37.27956
DEC 50:49:40.08522
l 90.81323759
b 59.52837829
G magnitude 9.392802
G_bp magnitude 9.662962
G_rp magnitude 8.997514
Radial velocity [km/s]
Parallax 6.15166969
Distance [pc] 0.162557
Temperature [K] 6196.467
Radius [R] 1.5962459
Luminosity [L] 3.3843153

Simbad link EF Boo
J magnitude 8.707
H magnitude 8.478
K magnitude 8.41
Johnson_U magnitude 9.96
Johnson_B magnitude 9.95
Johnson_V magnitude 9.45
Johnson_R magnitude 9.14
Johnson_I magnitude
Sloan_u magnitude 9.96
Sloan_g magnitude 9.3928
Sloan_r magnitude 9.14
Sloan_i magnitude
Sloan_z magnitude

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