HD 80653 Overview

HD 80653 1.22 R_⦿ 5838.00 K

HD 80653 b

0.145 R_Jup

K2-312 c

Overview Parameters Nearby Data Bibliography 10 Legend Expand All

HD 80653 Architecture & Discovery Information

Name	Orbital Separation	Planet Size	Method	Year	Reference	Disposition
HD 80653
HD 80653 b	0.72 d	1.62 R_⨁	Transit	2020	Frustagli et al. 2020	Confirmed Planet
K2-312 c	871.32 d	> 1681.31 M_⨁	Radial Velocity	2023	Bonomo et al. 2023	Confirmed Planet

HD 80653 Stellar Parameters (7 Solutions)

RA: 09h21m21.38s

Dec: +14d22m04.33s

Distance: 109.860+0.811-0.800
pc

Parallax: 9.0743500±0.0662085 mas

Ecliptic Latitude: -1.0467 deg

Ecliptic Longitude: 138.23096 deg

Galactic Latitude: 39.62439 deg

Galactic Longitude: 216.49965 deg

Total Proper Motion: 36.2761417±0.0875135 mas/yr

Proper Motion (RA): -33.4626000±0.0897427 mas/yr

Proper Motion (Dec): -14.0076000±0.0735093 mas/yr

Photometry: m_V
9.452±0.003; m_TESS
8.89098±0.00630; m_J
8.315±0.023; m_H
8.079001±0.029000; m_Ks
8.018±0.021; m_Kep
9.438; m_W1
7.959±0.024; m_W2
8.004±0.020; m_W3
8.011±0.021; m_W4
7.869±0.204; m_Gaia
9.307330±0.000346; m_B
10.119±0.047

Abundances (Hypatia Catalog): [Fe/H] 0.49±0.04 dex; [Mg/H] 0.51±0.07 dex

Mission: K2 : Observed in Campaign 16

Tools: Planetary Systems; ExoFOP Target Overview Page; IRSA Finding Chart; TOI; K2 Names; K2 Planets and Candidates; K2 Targets; Stellar Hosts; K2 Time Series

Source	Naponiello et al. 2026	Bonomo et al. 2023	Frustagli et al. 2020	TICv8	Gaia DR2	Yu et al. 2018	ExoFOP
L_✶ (log₁₀(L_⦿))	0.2117+0.0185-0.0194	---	0.24±0.02	0.23836480+0.01182518-0.01745623	0.23176903+0.00406463-0.00410303	---	---
γ (km/s)	---	---	8.31017±0.00220	---	8.4907890013659753±0.2566260456854415	---	---
Age (Gyr)	3.3+2.7-2.0	2.67±1.20	2.67±1.20	---	---	---	---
ρ_✶ (g/cm³)	0.9410±0.0950	---	0.90±0.06	0.7666438+0.1810217-0.1508359	---	---	---
M_✶ (M_⦿)	1.150+0.063-0.069	1.18±0.04	1.18±0.04	1.075000+0.135535-0.140582	---	---	---
R_✶ (R_⦿)	1.199±0.033	1.22±0.01	1.22±0.01	1.2550500+0.0642025-0.0520889	1.2764652+0.0248679-0.0215870	1.224±0.016	1.25504994392395±0.05814570000000
log g (log₁₀(cm/s²))	4.342+0.032-0.037	---	4.34±0.02	4.2721600+0.0795258-0.0767927	---	4.338±0.033	4.2721600±0.0781593
Sp. T	G0 V	---	G2	---	---	---	---
P_rot (days)	---	19.55+0.57-0.50	19.8±0.5	---	---	---	---
T_eff (K)	5959±61	5959±61	---	5910.000+101.307-152.704	5838.0+50.0-56.0	6080±130	5910.000±127.006
Metallicity (dex)	0.255±0.065 [Fe/H]	0.255±0.065 [Fe/H]	---	---	---	---	---
v sin i (km/s)	3.50±0.50	---	---	---	---	---	---

HD 80653 b Planetary Parameters (5 Solutions)

Status: Confirmed Planet

Detected By: Orbital Brightness Modulation, Radial Velocity, Transit

Tools: Planetary Systems; Transit Prediction Service; TOI; K2 Names; K2 Planets and Candidates; Transit

Source	Naponiello et al. 2026	Bonomo et al. 2023	Frustagli et al. 2020	Yu et al. 2018	ExoFOP
T_eq (K)	2438+47-45	2463±30	---	---	2301.93999511406
S (S_⨁)	---	6130±310	---	---	6635.85665977611
M_p (M_⨁)	5.61+0.38-0.37	5.72+0.36-0.35	5.60±0.43	---	---
M_p (M_Jup)	0.0177+0.0012-0.0012	0.0180+0.0011-0.0011	0.0176±0.0014	---	---
e	0	0	---	---	---
i (deg)	81.7+2.2-1.8	82.1±2.4	82.1±2.4	---	---
P (days)	0.71957926+0.00000042-0.00000036	0.719573±0.000021	0.719573±0.000021	0.719597	0.719571209844274±0.000052978325000
ρ (g/cm³)	7.24+0.97-0.81	7.47+1.20-1.00	7.4±1.1	---	---
R_p (R_⨁)	1.621+0.054-0.057	1.613±0.071	1.613±0.071	---	1.61084174422069±2.43317910000000
R_p (R_Jup)	0.1446+0.0048-0.0051	0.1439±0.0063	0.1439±0.0063	---	0.143709922189507±0.217074073470391
K (m/s)	3.66±0.20	3.62±0.21	3.55±0.26	---	---
a (au)	0.01657+0.00070-0.00071	0.01661±0.00019	0.0166±0.0003	---	---
T_C (days)	2458095.56741+0.00051-0.00052 (BJD)	2458134.42440±0.00070 (BJD-TDB)	2458134.4244±0.0007 (BJD-TDB)	2458095.56479 (BJD)	2459526.0912980±0.0018724 (BJD)
δ (%)	---	---	---	0.0149	0.0159640398493719±0.0018058200000000
T₁₄ (hours)	1.725+0.029-0.028	---	1.80+0.06-0.06	1.53360	1.75752191994997±0.34870010000000
a/R_✶	2.973+0.096-0.100	---	2.92±0.05	---	---
b	0.429+0.075-0.107	---	0.40+0.08-0.14	---	---
R_p/R_✶	0.01242+0.00022-0.00029	---	0.0121±0.0004	---	---
ω (deg)	90	---	---	---	---

K2-312 c Planetary Parameters (2 Solutions)

Status: Confirmed Planet

Detected By: Radial Velocity

Tools: Planetary Systems; K2 Names; K2 Planets and Candidates

Source	Naponiello et al. 2026	Bonomo et al. 2023
ω (deg)	41.3±0.5	41.6±2.2
M_p sin i (M_⨁)	1681+64-70	1719+165-140
M_p sin i (M_Jup)	5.29+0.20-0.22	5.41+0.52-0.44
e	0.8435±0.0013	0.853±0.011
P (days)	871.32±0.13	921.2±10.8
K (m/s)	191.6±1.3	194+17-13
a (au)	1.882+0.080-0.081	1.961±0.027
T_C (days)	2458968.72±0.23 (BJD)	2458968.80±0.41 (BJD-TDB)
a/R_✶	338±11	---
T_eq (K)	229+5-4	---

Nearby Data (within 30 arcseconds) Browse Nearby Data

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Known Objects: 2 Confirmed Planets; 1 K2 Targets; 2 2MASS Point Source Catalog

Data Files: 1 K2 Time Series; 2 Associated Literature Data

Bibliography (10 References)

Refined parameters, formation, and dynamical stability of the wild exoplanet system K2-312=HD 80653
Naponiello et al. 2026 Reference Overview
Cold Jupiters and improved masses in 38 Kepler and K2 small planet systems from 3661 HARPS-N radial velocities. No excess of cold Jupiters in small planet systems
Bonomo et al. 2023 Reference Overview
An ultra-short period rocky super-Earth orbiting the G2-star HD 80653
Frustagli et al. 2020 Reference Overview
The Revised TESS Input Catalog and Candidate Target List
TICv8 Reference Overview
Gaia Data Release 2
Gaia DR2 Reference Overview
Planetary Candidates from K2 Campaign 16
Yu et al. 2018 Reference Overview
ExoFOP TOI Table
ExoFOP
The K2 Ecliptic Plane Input Catalog (EPIC) and Stellar Classifications of 138,600 Targets in Campaigns 1-8
EPIC Catalog Reference Overview
All WISE Data Release
Cutri et al. 2014 Reference Overview
2MASS All-Sky Catalog of Point Sources
2MASS Point Source Catalog Reference Overview

System
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False Positive Planet
Controversial
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