exoclock

XO-1b (LOW)

Discovered by: McCullough et al. 2006

The Star
Simbad
GAIA
2MASS		 BD+28 2507
DR2 1316708918505350528
J16021184+2810105
RA 16:02:11.8463 DEC +28:10:10.419
Parallax
6.085 mas		 P.M. RA
-17.422 mas/y		 P.M. DEC
14.82 mas/y
MagV
11.25		 MagR
10.81		 MagI
10.43		 MagJ
9.939		 MagH
9.601		 MagK
9.527
MagG
11.004		 MagGBP
11.369		 MagGRP
10.499
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2022
Mid-time
2455787.553228 ± 7.7e-05 BJDTDB
Period
3.94150468 ± 2e-07 days
Transit Parameters
Torres et al. 2008
Rp/Rs
0.1326 ± 0.0005		 a/Rs**
11.24 +0.09 -0.09
 i
88.8 +0.7 -0.3 deg
e
-		 ω
- deg
DepthR*
23.26 mmag		 Duration*
2.97 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Torres et al. 2008
Teff
5750.0 +75.0 -75.0 K
 Log(g)
4.53 +0.06 -0.06 cm/s2
 Fe/H
0.02 +0.08 -0.08 dex
ExoClock Status
Observing Priority LOW
Minimum aperture 5.0"
Total Observations (Recent) 53 (3)
O-C 0.19 ± 0.24 minutes
ExoClock Observations (Recent) 28 (1)
Space Observations (Recent) 4 (0)
ETD Observations (Recent) 2 (2)
Literature Mid-times (Recent) 19 (0)
Kepler Rp/Rs -
TESS Rp/Rs 0.13094 ± 0.00048

XO-1b


ExoClock Observations
Planet
Observation Date		 Observer
Observatory		 Telescope
Camera / Filter / Exp [s]		 O-C
minutes
XO-1b (LOW)
2024-04-22		BRIAN HALKETT
GLIO		TEC APO180FL
QHYCCD QHY268M / R / 240.0		0.67 ± 1.58
XO-1b (LOW)
2023-03-25		David Molina
Anunaki Observatory Z51		Schmidt Cassegrain
SBIG ST-9xe / R / 180.0		-1.01 ± 0.62
XO-1b (LOW)
2022-07-07		Sebastien Brouillard
AstroQueyras		RC500
STX16803 / R / 120.0		1.36 ± 0.86
XO-1b (LOW)
2022-07-07		Simon Dawes
William James II Observatory		Skywatcher MN190 2
ZWO ASI 1600MM-PRO USB 3.0 Mono Camera / Lum / 60.0		-1.23 ± 1.87
XO-1b (LOW)
2022-07-04		Robert Roth
TURMX Observatory		CFF Telescopes 160mm APO
ZWO ASI6200MM Pro / Lum / 60.0		0.5 ± 1.3
XO-1b (LOW)
2022-07-04		Kevin Johnson
Holbrook Observatory		Meade LX10 EMC
Atik 383L+ / R / 75.0		0.07 ± 1.87
XO-1b (LOW)
2022-07-04		David Arnot
OSO PIRATE		PlaneWave Instruments CDK24 24 inch (610 mm) f/6.5 Corrected Dall-Kirkham Astrograph
FLI ProLine KAF-16803 / R / 40.0		-0.82 ± 0.48
XO-1b (LOW)
2022-06-30		Fabio Guillelmon
Stellarium Gornergrat		RiFast 600
FLI Proline PL16803 / Clear / 45.0		2.09 ± 1.44
XO-1b (LOW)
2022-04-28		Leon Bewersdorff
Observatory Kipshoven (BLEW)		GSO Ritchey-Chrétien
QHY268M-PH / V / 200.0		1.19 ± 1.01
XO-1b (LOW)
2021-05-31		Carmelo Falco
GALHassin Robotic Telescope 2 (GRT2)		Giacometti-Fogale RC16
Andor Apogee Aspen CG16M / R / 45.0		1.76 ± 0.86
XO-1b (LOW)
2021-05-31		Carmelo Falco
GAL Hassin Robotic Telescope 2 (GRT2) - Multiband		Giacometti-Fogale RC16 - 2
Andor Apogee Aspen CG16M / gpr / 50.0		0.75 ± 0.58
XO-1b (LOW)
2021-05-31		Fabio Mortari
Hypatia Observatory		Ritchey Chretienne 250mm f/5.3
Sbig ST8-XE / R / 150.0		-3.86 ± 2.74
XO-1b (LOW)
2021-05-31		Andras Dan
Rocca1		Celestron C8
QHY 183 M / V / 30.0		-4.0 ± 1.44
XO-1b (LOW)
2021-05-27		Martin Crow
Burnham Observatory		Celestron C9.25
SX694 mono / R / 75.0		1.77 ± 1.3
XO-1b (LOW)
2021-05-27		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / R / 120.0		0.18 ± 1.01
XO-1b (LOW)
2021-05-24		Adam Popowicz
Otivar dome2		Newton 12" ASA
ASI ZWO 1600MM / R / 15.0		-1.25 ± 1.01
XO-1b (LOW)
2020-06-26		Lorenzo Betti
Osservatorio Polifunzionale del Chianti		RC-80cm
Moravian G4 - KAF 09000 / V / 120.0		2.12 ± 0.29
XO-1b (LOW)
2020-06-26		Mauro Caló
Cavallino		RC
SBIG ST10 / Lum / 50.0		0.76 ± 1.3
XO-1b (LOW)
2020-05-02		Vikrant Kumar Agnihotri
Cepheid Observatory India		C8/f6.3 Schmidt-Cassegrain
Atik383L+ mono / R / 60.0		2.0 ± 1.3
XO-1b (LOW)
2020-04-20		Mark Phillips
Forthimage		OO Newtonian CCD
Atik 460EX / R / 60.0		2.02 ± 1.58
XO-1b (LOW)
2020-04-20		Adrian Jones
Private Observatory (I64)		Meade ACF 30cm
QSI 583 / R / 30.0		-0.43 ± 2.3
XO-1b (LOW)
2020-04-20		Martin Crow
Burnham Observatory		Celestron C9.25
SX694 mono / R / 120.0		-2.15 ± 1.15
XO-1b (LOW)
2020-04-17		Manfred Raetz
privat observatory Herges-Hallenberg		SCT 280 /1790 (Celestron C11 with reducer)
Moravian Instruments G2-1600 / Clear / 120.0		-0.71 ± 0.86
XO-1b (LOW)
2019-03-08		Iakovos Strikis
Elizabeth Observatory of Athens		Sky Watcher Quattro
SBIG STF-8300mm / Lum / 40.0		4.74 ± 1.15
XO-1b (LOW)
2017-07-12		Anaël Wünsche
Observatoire des Baronnies Provençales		Astelco
FLIPL230 / Lum / 60.0		-1.57 ± 0.58
XO-1b (LOW)
2016-03-30		Alessandro Marchini
Astronomical Observatory University of Siena		Mak-Cas 0.3m f/5.6
Sbig STL-6303 / R / 180.0		1.39 ± 1.15
XO-1b (LOW)
2012-05-19		Filip Walter
Stefanik Observatory		Meade SCT
SBIG ST-10XME / R / 60.0		1.07 ± 0.86
XO-1b (LOW)
2011-04-02		Ramon Naves
Montcabrer		Meade LX200 12" ACF
Sbig ST8xme / R / 120.0		2.62 ± 0.82

Space Observations
Planet
Observation Date		 Mission O-C
minutes
XO-1b (LOW)
2020-05-10		TESS-0.72 ± 0.39
XO-1b (LOW)
2020-05-06		TESS-1.11 ± 0.37
XO-1b (LOW)
2020-04-24		TESS-0.14 ± 0.48
XO-1b (LOW)
2020-04-20		TESS-0.47 ± 0.43

ETD Observations
Planet
Observation Date		 Observer(s) ETD link O-C
minutes
XO-1b (LOW)
2023-06-11		F. Lomoz16865991782.84 ± 0.99
XO-1b (LOW)
2023-05-11		Kevin B. Alton16839069610.52 ± 0.48

Literature Mid-times
Planet
Observation Date		 Reference O-C
minutes
2014-05-26 Southworth et al. 2018 0.38 ± 0.22
2012-05-12 Southworth et al. 2018 0.73 ± 0.23
2012-05-12 Southworth et al. 2018 -0.51 ± 0.43
2012-05-12 Southworth et al. 2018 -0.66 ± 0.2
2012-05-08 Southworth et al. 2018 0.86 ± 0.24
2012-05-08 Southworth et al. 2018 -0.37 ± 0.19
2012-05-08 Southworth et al. 2018 -0.38 ± 0.27
2011-09-30 Deming et al. 2013 0.83 ± 0.24
2010-04-28 Southworth et al. 2018 0.34 ± 0.2
2007-05-06 Cáceres et al. 2009 1.52 ± 0.53
2007-05-02 Cáceres et al. 2009 1.21 ± 0.56
2007-05-02 Cáceres et al. 2009 0.37 ± 0.52
2007-04-28 Cáceres et al. 2009 -0.45 ± 1.64
2006-06-01 Burke et al. 2010 -0.33 ± 0.16
2006-06-01 Holman et al. 2006 -0.65 ± 0.23
2006-05-28 Holman et al. 2006 -0.13 ± 0.27
2006-05-24 Holman et al. 2006 -0.38 ± 1.58
2006-05-20 Holman et al. 2006 0.46 ± 0.52
2006-03-14 McCullough et al. 2006 -0.11 ± 1.58
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