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XO-4b

Discovered by: McCullough et al. 2008
The Star
Simbad
GAIA
2MASS
XO-4
DR2 990291507088739072
J07213317+5816051
RA 07:21:33.1602 DEC +58:16:05.111
Parallax
3.639 mas
P.M. RA
-16.989 mas/y
P.M. DEC
5.31 mas/y
MagV
10.81
MagR*
10.322
MagI*
10.239
MagJ
9.667
MagH
9.476
MagK
9.406
MagG
10.513
MagGBP
10.778
MagGRP
10.117
* calculated from GAIA magnitudes

Ephemeris - Not verified False
Narita et al. 2010
Mid-time
2454485.9332 ± 0.0004 BJDTDB
Period
4.125083 ± 4e-06 days

Transit Parameters
Narita et al. 2010
Rp/Rs
0.0881 ± 0.0007
a/Rs
7.68 +0.11 -0.11
i
88.8 +0.6 -0.6 deg
e
-
ω
- deg
DepthR*
10.15 mmag
Duration*
4.43 hours
* calculated from the other parameters, using PyLightcurve

Limb Darkening Parameters
McCullough et al. 2008
Teff
6397.0 +70.0 -70.0 K
Log(g)
4.18 +0.07 -0.07 cm/s2
Fe/H
-0.04 +0.03 -0.03 dex
ExoClock Status
Observing Priority
Total Observations (Recent)
O-C minutes
Total Literature Mid-times
LOW
8 (3)
-23.3±0.9
17
XO-4b


ExoClock Observations
Obs. Date O-C (min) Observer
Observatory
Telescope
Camera / Filter / Exp [s]
2020-11-06 -27.7 ± 4.3 Adrian Jones
Private Observatory (I64)
Meade ACF 30cm
QSI 583 / R / 30.0
2020-11-01 -21.8 ± 5.8 Alberto Tomatis
Alto-Observatory
RC
STL 6303 / Lum / 60.0
2020-10-28 -24.6 ± 4.3 Martin Crow
Burnham Observatory
Celestron C9.25
SX694 mono / R / 15.0
2020-03-11 -21.9 ± 2.2 Alessandro Nastasi
Galhassin Robotic Telescope 1 (GRT1)
Officina Stellare RiLa 400
FLI ProLine 16803 / R / 45.0
2020-03-11 -23.8 ± 1.6 Danilo Sedita
Osservatorio Sedita Castrofilippo
RC GSO
Moravian G2-1600 / Rc / 30.0
2020-02-07 -25.6 ± 4.3 Mauro Calo’
Cavallino
GSO RC
SBIG ST10 / R / 60.0
2020-01-05 -22.3 ± 2.3 Yves Jongen
Rasteau Observatory
Plane Wave CDK 17"
SBIG STXL 11002 / V / 120.0
2020-01-05 -22.7 ± 1.9 Pere Guerra
Observatori Astronòmic Albanyà
16" Meade ACF F8
Moravian G4-9000 / Ic / 120.0
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