exoclock

HAT-P-21b

Discovered by: Bakos et al. 2011

The Star
Simbad
GAIA
2MASS
HAT-P-21
DR2 770622651659107712
J11250598+4101406
RA 11:25:05.9858 DEC +41:01:40.669
Parallax
3.578 mas
P.M. RA
-1.088 mas/y
P.M. DEC
13.243 mas/y
MagV
11.46
MagR
11.71
MagI*
10.716
MagJ
10.503
MagH
10.154
MagK
10.111
MagG
11.558
MagGBP
11.921
MagGRP
11.059
*Calculated from GAIA magnitudes.

Ephemeris - Not verified False
Bakos et al. 2011
Mid-time
2454996.4139 ± 0.0007 BJDTDB
Period
4.124481 ± 7e-06 days

Transit Parameters
Bakos et al. 2011
Rp/Rs
0.095 ± 0.0022
a/Rs
9.6 +0.7 -0.7
i
87.2 +0.7 -0.7 deg
e
0.228 +0.016 -0.016
ω
309.0 +3.0 -3.0 deg
DepthR*
11.12 mmag
Duration*
3.71 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted to produce a duration that matches the observations.

Limb Darkening Parameters
Bakos et al. 2011
Teff
5588.0 +80.0 -80.0 K
Log(g)
4.33 +0.06 -0.06 cm/s2
Fe/H
0.01 +0.08 -0.08 dex
ExoClock Status
Observing Priority
ExoClock Observations (Recent)
Space Observations
Literature Mid-times
ETD Observations
O-C minutes
ALERT
12 (4)

0

10.7±0.8

HAT-P-21b


ExoClock Observations

Observation
Date
Observer
Observatory
Telescope
Camera / Filter / Exp [s]
O-C
minutes
2022-05-02 Mauro Caló
Cavallino
RC
SBIG ST10 / Lum / 60.0
17.7 ± 4.3
2022-05-02 Antonio Ferretti
Gruppo Astrofili Frentani - Anxanum Observatory
Meade LX200 ACF
FLI MicroLine 11002 / Clear / 60.0
14.8 ± 4.3
2022-02-25 Simon Dawes
William James II Observatory
Skywatcher MN190 2
ZWO ASI 1600MM-PRO USB 3.0 Mono Camera / Lum / 120.0
3.3 ± 3.5
2022-01-28 Tobias Gesser
TURMX Observatory
CFF Telescopes 160mm APO
ZWO ASI6200MM Pro / Lum / 120.0
10.3 ± 2.9
2021-04-01 Anaël Wünsche
Observatoire des Baronnies Provençales
CDK Planewave 2
ZWO ASI6200 / R / 120.0
12.9 ± 2.3
2021-03-28 Carmelo Falco
GALHassin Robotic Telescope 2 (GRT2)
Giacometti-Fogale RC16
Andor Apogee Aspen CG16M / Lum / 60.0
10.0 ± 2.0
2021-02-27 Adrian Jones
Private Observatory (I64)
Meade ACF 30cm
QSI 583 / R / 99.0
9.4 ± 2.9
2021-02-27 Lionel Rousselot
lroussel
Newton
ZWO 1600 monochrome / Clear / 180.0
8.5 ± 2.4
2021-01-25 Yves Jongen
Rasteau Observatory
Plane Wave CDK 17"
SBIG STXL 11002 / Lum / 120.0
14.5 ± 2.4
2021-01-25 Adrian Jones
Private Observatory (I64)
Meade ACF 30cm
QSI 583 / R / 100.0
11.0 ± 2.6
2021-01-21 Vikrant Kumar Agnihotri
Cepheid Observatory India
C11/f5.5 Schmidt-Cassegrain
Atik383L+ mono / R / 90.0
8.1 ± 4.3
2020-01-24 Nikolaos Paschalis
Nunki Observatory
Officina Stellare RILA 400
SBIG STXL 11002 / R / 90.0
10.0 ± 2.2
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