| The Star | |||||
|---|---|---|---|---|---|
| Simbad GAIA 2MASS |
HAT-P-66 DR2 852608874351434752 J10021743+5357031 |
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| RA | 10:02:17.4467 | DEC | +53:57:03.201 | ||
| Parallax 1.04 mas |
P.M. RA -9.381 mas/y |
P.M. DEC -15.255 mas/y |
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| MagV 12.99 |
MagR 12.94 |
MagI 12.339 |
MagJ 12.001 |
MagH 11.735 |
MagK 11.675 |
| MagG 12.892 |
MagGBP 13.178 |
MagGRP 12.456 |
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| *Calculated from GAIA magnitudes. | |||||
Ephemeris
- Verified 
|
|||||
|---|---|---|---|---|---|
| Kokori et al. 2025 | |||||
| Mid-time 2458622.98846 ± 0.00042 BJDTDB |
|||||
| Period 2.9720884 ± 1.3e-06 days |
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| Transit Parameters | |||||
| Hartman et al. 2016 | |||||
| Rp/Rs 0.0872 ± 0.0024 |
a/Rs 5.01 +0.21 -0.32 |
i 86.2 +1.8 -1.8 deg |
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| e - |
ω - deg |
||||
| DepthR* 9.83 mmag |
Duration* 4.74 hours |
||||
|
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations. |
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| Limb Darkening Parameters | |||||
| Hartman et al. 2016 | |||||
| Teff 6002.0 +50.0 -50.0 K |
Log(g) 3.99 +0.04 -0.04 cm/s2 |
Fe/H 0.04 +0.08 -0.08 dex |
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| ExoClock Status | |||||
|---|---|---|---|---|---|
| Observing Priority | LOW | ||||
| Minimum aperture | 9.33" | ||||
| Total Observations (Recent) | 34 (3) | ||||
| O-C | -0.95 ± 1.12 minutes | ||||
| ExoClock Observations (Recent) | 19 (3) | ||||
| Space Observations (Recent) | 14 (0) | ||||
| ETD Observations (Recent) | 0 (0) | ||||
| Literature Mid-times (Recent) | 1 (0) | ||||
| Kepler Rp/Rs | - | ||||
| TESS Rp/Rs | 0.0874 ± 0.00094 | ||||
ExoClock Observations |
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| Planet Observation Date |
Observer Observatory |
Telescope Camera / Filter / Exp [s] |
O-C minutes |
|
|---|---|---|---|---|
| HAT-P-66b (LOW) 2025-11-21 | David Bennett Rickford Observatory | GSO RC ZWO ASI2600MM Pro / Lum / 180.0 | 6.94 ± 3.31 | |
| HAT-P-66b (LOW) 2025-01-07 | Alvaro Fornas Valencia city | SW MN190 Atik One 6 / Lum / 120.0 | 5.15 ± 7.92 | |
| HAT-P-66b (LOW) 2024-12-23 | Ken Menzies Tigh Speuran | Hyperion STL-6303e / V / 90.0 | -1.84 ± 7.34 | |
| HAT-P-66b (LOW) 2024-12-05 | Bryan Martin Tiger Butte Observatory Remote | AG Optical IDK ZWO ASI 294 / Lum / 180.0 | -6.55 ± 4.03 | |
| HAT-P-66b (LOW) 2024-03-12 | Enrique Arce Vallbona Observatory | Ritchey Chretien ZWO ASI 294 MM PRO / Lum / 300.0 | 10.95 ± 6.05 | |
| HAT-P-66b (LOW) 2024-03-12 | Esteban Reina Observatori de Masquefa | Meade LX200 ZWO ASI 294 MM Pro / R / 120.0 | 5.48 ± 4.9 | |
| HAT-P-66b (LOW) 2024-03-07 | Anaël Wünsche Observatoire des Baronnies Provençales | CDK Planewave 2 ZWO ASI6200 / R / 120.0 | -0.46 ± 2.45 | |
| HAT-P-66b (LOW) 2024-03-07 | Guillaume Biesse Observatoire de la colline Tossius | Ritchey Chretien GSO ASI 533 MM - Gain=0 / Clear / 180.0 | -0.89 ± 5.33 | |
| HAT-P-66b (LOW) 2024-03-07 | Marc Serrau A77 - Dauban | Meade SC 12" QHY260MM / rpr / 300.0 | -10.54 ± 3.89 | |
| HAT-P-66b (LOW) 2024-03-04 | Manfred Raetz privat observatory Herges-Hallenberg | SCT 280/1850 (C11 with Starizona reducer) Moravian Instruments G2-1600 / AstrodonExoPlanet-BB / 120.0 | 8.6 ± 3.31 | |
| HAT-P-66b (LOW) 2024-03-04 | Adrian Jones Private Observatory (I64) | Meade ACF 30cm QSI 583 / Lum / 200.0 | 0.39 ± 4.75 | |
| HAT-P-66b (LOW) 2024-03-04 | Lluís Romero Ventura Astro-Tolva | RC16" QHY 268C / Lum / 120.0 | -4.5 ± 4.9 | |
| HAT-P-66b (LOW) 2024-03-04 | Aziz Ettahar Kaeouach High Atlas Observatory | PlaneWave CDK 12.5 Zwo asi 294 mm pro / Clear / 120.0 | -15.02 ± 3.31 | |
| HAT-P-66b (LOW) 2022-03-03 | Yves Jongen Rasteau Observatory | Plane Wave CDK 17" FLI Kepler CMOS 4040 / Lum / 120.0 | -4.87 ± 2.59 | |
| HAT-P-66b (LOW) 2022-03-03 | Manfred Raetz privat observatory Herges-Hallenberg | SCT 280 /1790 (Celestron C11 with reducer) Moravian Instruments G2-1600 / Clear / 120.0 | -5.44 ± 4.32 | |
| HAT-P-66b (LOW) 2022-02-20 | Sebastien Brouillard AstroQueyras | RC500 STX16803 / R / 120.0 | 5.14 ± 5.76 | |
| HAT-P-66b (LOW) 2022-02-11 | Adrian Jones Private Observatory (I64) | Meade ACF 30cm QSI 583 / Lum / 200.0 | 0.77 ± 3.17 | |
| HAT-P-66b (LOW) 2021-03-21 | Paul Benni Acton Sky Portal | C11 EdgeHD SBIG ST8XME / AstrodonExoPlanet-BB / 40.0 | 1.96 ± 1.87 | |
| HAT-P-66b (LOW) 2021-01-29 | Taewoo Kim Deokheung Optical Astronomy Observatory | NYSC 1m Telescope FLI PL-16803 or PI SOPHIA-2048B / R / 120.0 | -1.35 ± 4.32 | |
Space Observations |
||||
| Planet Observation Date |
Mission | O-C minutes |
||
| HAT-P-66b (LOW) 2022-02-22 | TESS | -2.33 ± 3.6 | ||
| HAT-P-66b (LOW) 2022-02-20 | TESS | 7.45 ± 4.75 | ||
| HAT-P-66b (LOW) 2022-02-17 | TESS | 2.82 ± 4.46 | ||
| HAT-P-66b (LOW) 2022-02-08 | TESS | 1.48 ± 3.17 | ||
| HAT-P-66b (LOW) 2022-02-05 | TESS | 1.03 ± 3.31 | ||
| HAT-P-66b (LOW) 2022-02-02 | TESS | 0.0 ± 3.02 | ||
| HAT-P-66b (LOW) 2020-02-16 | TESS | 2.6 ± 3.17 | ||
| HAT-P-66b (LOW) 2020-02-13 | TESS | -2.02 ± 2.45 | ||
| HAT-P-66b (LOW) 2020-02-10 | TESS | 4.87 ± 3.46 | ||
| HAT-P-66b (LOW) 2020-02-07 | TESS | -3.06 ± 4.46 | ||
| HAT-P-66b (LOW) 2020-02-02 | TESS | -1.08 ± 2.59 | ||
| HAT-P-66b (LOW) 2020-01-30 | TESS | 1.21 ± 2.74 | ||
| HAT-P-66b (LOW) 2020-01-27 | TESS | -6.73 ± 4.32 | ||
| HAT-P-66b (LOW) 2020-01-24 | TESS | 0.45 ± 2.45 | ||
Literature Mid-times |
||||
| Planet Observation Date |
Reference | O-C minutes |
||
| 2015-08-24 | Hartman et al. 2016 | -0.04 ± 1.04 | ||