rho CrB | NASA Exoplanet Archive

Name	Orbital Separation	Planet Size	Method	Year	Reference	Disposition
rho CrB
rho CrB e	12.9 d	> 3.71 M_⨁	Radial Velocity	2023	Brewer et al. 2023	Confirmed Planet
rho CrB b	39.85 d	> 348 M_⨁	Radial Velocity	1997	Noyes et al. 1997	Confirmed Planet
rho CrB c	102.04 d	> 27.44 M_⨁	Radial Velocity	2016	Fulton et al. 2016	Confirmed Planet
rho CrB d	282.2 d	> 21.6 M_⨁	Radial Velocity	2023	Brewer et al. 2023	False Positive Planet

Exoplanet Archive Notes (4)

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rho CrB

Some stellar parameter values may be biased due to companion blend (WDS Catalog)

rho CrB b

Longitude of periastron value drawn from Erratum (1997ApJ...487L.195N). (Noyes et al. 1997)
Planet flagged as controversial. (Reffert & Quirrenbach 2011)

rho CrB d

Confirmed planet signal refuted in ref. (Zhao et al. 2026)

rho CrB Stellar Parameters (35 Solutions)

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RA: 16h01m02.42s

Dec: +33d18m00.67s

Distance: 17.4671+0.0241-0.0240
pc

Parallax: 57.2216000±0.0781576 mas

Ecliptic Latitude: 52.40991 deg

Ecliptic Longitude: 227.17715 deg

Galactic Latitude: 48.92412 deg

Galactic Longitude: 53.48367 deg

Total Proper Motion: 797.5220847±0.1498139 mas/yr

Proper Motion (RA): -198.536000±0.107665 mas/yr

Proper Motion (Dec): -772.415000±0.152188 mas/yr

Photometry: m_V
5.40816±0.02300; m_TESS
4.8248±0.0064; m_J
4.088±0.240; m_H
3.989±0.036; m_Ks
3.857±0.036; m_W1
3.902±0.212; m_W2
3.588±0.050; m_W3
3.904±0.015; m_W4
3.850±0.022; m_Gaia
5.2416700±0.0021744; m_B
6.001±0.021

Abundances (Hypatia Catalog): [Fe/H] -0.18±0.14 dex; [C/H] 0.02±0.30 dex; [O/H] -0.01±0.14 dex; [Na/H] -0.25±0.10 dex; [Mg/H] -0.01±0.11 dex; [Al/H] -0.08±0.12 dex; [Si/H] -0.15±0.08 dex; [Ca/H] -0.11±0.10 dex; [Y/H] -0.18±0.19 dex; [BaII/H] -0.32±0.12 dex

Tools: Planetary Systems; ExoFOP Target Overview Page; IRSA Finding Chart; Stellar Hosts

Source	Zhao et al. 2026	Harada et al. 2025	Brewer et al. 2023	Rosenthal et al. 2021	TICv8	Gaia DR2	Fulton et al. 2016	Turnbull 2015	von Braun et al. 2014	Takeda et al. 2007	Valenti & Fischer 2005	Wright et al. 2004	Nordstrom et al. 2004	Gray et al. 2003	Santos et al. 2003	Nidever et al. 2002	Noyes et al. 1997	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Duncan et al. 1991	Cannon & Pickering 1918
S Index	---	---	---	---	---	---	---	---	---	---	---	0.145±0.019	---	---	---	---	---	0.1483±0.0037	0.1490±0.0042	0.1478±0.0041	0.1480±0.0035	0.1468±0.0037	0.1510±0.0045	0.1480±0.0052	0.1465±0.0025	0.1457±0.0017	0.1468±0.0051	0.1483±0.0037	0.1490±0.0042	0.1478±0.0041	0.1480±0.0035	0.1468±0.0037	0.1510±0.0045	0.1480±0.0052	---
CAII LOG RHK	---	---	---	---	---	---	---	---	---	---	---	-5.08	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---
T_eff (K)	---	5812	5817±24	5770.309493245000±84.020829477975	5833.000+141.167-124.154	5852.50+155.75-59.25	5627±54	5823	5627±54	---	---	---	---	---	5835	---	5777	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---
L_✶ (log₁₀(L_⦿))	---	---	0.260+0.019-0.020	---	0.25817353+0.01429732-0.00967732	0.27110584+0.00096920-0.00097134	0.2320+0.0106-0.0108	0.262±0.014	0.23195+0.01064-0.01090	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---
Metallicity (dex)	---	---	-0.20±0.01 [Fe/H]	-0.1942034261335000±0.0593215195620000 [Fe/H]	-0.17±0.10 [M/H]	---	-0.31±0.05 [Fe/H]	-0.2 [Fe/H]	-0.22 [Fe/H]	---	---	---	---	---	-0.21 [Fe/H]	---	-0.19 [Fe/H]	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---
Age (Gyr)	---	---	10.2±0.5	---	---	---	---	11.04	12.9	11.04+0.88-0.72	---	---	---	---	---	---	10	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---
M_✶ (M_⦿)	1.0	---	0.95±0.01	0.91121413935350±0.03067040857275	1.050000+0.119016-0.153624	---	0.889±0.030	0.97	0.91	0.965+0.022-0.020	---	---	---	---	0.95	---	1.0	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---
R_✶ (R_⦿)	---	---	1.34±0.04	1.35523333937500±0.03206626823193	1.3181200+0.0690482-0.0622935	1.3289931+0.0273233-0.0680090	1.3617±0.0262	1.35	1.3617±0.0262	1.35+0.03-0.02	---	---	---	---	---	---	1.31	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---
Sp. T	G0	---	---	---	---	---	G0 V	G2V	G0 V	---	---	---	---	G0 V	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	F8
v sin i (km/s)	---	---	0.80±0.30	---	---	---	<2	---	---	---	1.6±0.5	---	2	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---
log g (log₁₀(cm/s²))	---	---	4.25±0.05	4.13226692367500±0.02492130532632	4.2193500+0.0864775-0.0748518	---	4.121±0.018	4.18	---	4.18+0.03-0.01	---	---	---	---	4.40	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---
γ (km/s)	---	---	---	---	---	17.981116100722531±0.144118928722215	---	---	---	---	17.3	---	17.8±0.1	---	---	17.9	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---
ρ_✶ (g/cm³)	---	---	---	---	0.6463814+0.1616775-0.1284718	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---	---

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rho CrB e Planetary Parameters (2 Solutions)

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Status: Confirmed Planet

Detected By: Radial Velocity

Tools: Planetary Systems

Source	Zhao et al. 2026	Brewer et al. 2023
T_p (days)	2455496.721±3.641 (JD)	2455496.2+5.7-5.0 (BJD)
ω (deg)	330.8±103.0	-0.600+49.000-57.000
M_p sin i (M_⨁)	3.710±0.598	3.79+0.53-0.54
M_p sin i (M_Jup)	0.01167±0.00188	0.0119+0.0017-0.0017
e	0.0820±0.0470	0.126+0.054-0.078
P (days)	12.904±0.011	12.949±0.014
K (m/s)	1.05±0.16	1.140±0.015
a (au)	---	0.1061±0.0011
T_C (days)	---	2455498.5+4.6-4.7 (BJD)

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rho CrB b Planetary Parameters (6 Solutions)

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Status: Confirmed Planet; Controversial

Detected By: Radial Velocity

Tools: Planetary Systems

Source	Zhao et al. 2026	Harada et al. 2025	Brewer et al. 2023	Rosenthal et al. 2021	Fulton et al. 2016	Noyes et al. 1997
T_p (days)	2455499.084±0.182 (JD)	---	2455498.70+0.75-39.00 (BJD)	---	---	2450413.7±8.2 (HJD)
ω (deg)	270.1±3.0	-88.8±3.8	-90.36+3.44-3.32	-80.0+200.0-5.4	270.6+5.9-5.8	30.0±74.0
M_p sin i (M_⨁)	347.995±0.054	393.0+20.0-21.0	347.4±7.3	335.9±7.6	332.1+7.5-7.6	350
M_p sin i (M_Jup)	1.09491±0.00017	1.237+0.063-0.066	1.093±0.023	1.057±0.024	1.045+0.024-0.024	1.1
e	0.046±0.002	0.0385+0.0027-0.0028	0.0380±0.0025	0.0355+0.0035-0.0037	0.0373+0.0040-0.0039	0.028±0.040
P (days)	39.849±0.002	39.84336±0.00038	39.8438±0.0027	39.84324+0.00067-0.00066	39.8458+0.0015-0.0014	39.645±0.088
K (m/s)	67.488±0.174	67.07±0.18	67.28±0.19	66.99±0.23	67.28±0.25	67.4±2.2
a (au)	---	0.2393+0.0061-0.0064	0.2245+0.0023-0.0024	0.2213±0.0025	0.2196+0.0024-0.0025	0.23
T_C (days)	---	2457113.758+0.040-0.039 (JD)	2455479.62±0.29 (BJD)	2456516.109+0.051-0.052 (BJD)	---	---
a/R_✶	---	---	---	---	34.66+0.78-0.76	---
T_eq (K)	---	---	---	---	614.0+9.1-9.0	---
S (S_⨁)	---	---	---	---	34.7+2.1-2.0	---

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rho CrB c Planetary Parameters (5 Solutions)

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Status: Confirmed Planet

Detected By: Radial Velocity

Tools: Planetary Systems

Source	Zhao et al. 2026	Harada et al. 2025	Brewer et al. 2023	Rosenthal et al. 2021	Fulton et al. 2016
T_p (days)	2455480.216±9.336 (JD)	---	2455609+13-14 (BJD)	---	---
ω (deg)	244.4+54.8-24.8	-3.0+36.0-38.0	9.70+25.20-30.90	16+48-74	190+110-140
M_p sin i (M_⨁)	27.442±0.709	31.5±2.2	28.2±1.5	28.1+1.7-1.8	25±2
M_p sin i (M_Jup)	0.086342±0.002231	0.0991±0.0069	0.0887±0.0047	0.0885+0.0055-0.0056	0.079±0.006
e	0.048±0.034	0.0770+0.0530-0.0490	0.0960+0.0530-0.0540	0.044+0.050-0.031	0.0520+0.0610-0.0370
P (days)	102.036±0.204	102.579±0.041	102.19+0.27-0.22	102.557+0.078-0.079	102.54±0.17
K (m/s)	3.891±0.160	3.94±0.18	4.00+0.18-0.17	4.10+0.23-0.24	3.74±0.28
a (au)	---	0.449+0.011-0.012	0.4206+0.0044-0.0045	0.4157+0.0046-0.0047	0.4123+0.0046-0.0047
T_C (days)	---	2455204.4+2.1-2.2 (JD)	2455629.3+8.6-11.0 (BJD)	2455206.1+1.7-1.9 (BJD)	---
a/R_✶	---	---	---	---	65.1+1.5-1.4
T_eq (K)	---	---	---	---	448.1±6.6
S (S_⨁)	---	---	---	---	9.850+0.600-0.560

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rho CrB d Planetary Parameters (2 Solutions)

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Status: False Positive Planet

Detected By: Radial Velocity

Tools

Source	Brewer et al. 2023	Harada et al. 2025
T_p (days)	2455512+55-32 (BJD)	---
ω (deg)	0	-57.0+140.0-63.0
M_p sin i (M_⨁)	21.6±2.5	13.5+2.3-2.2
M_p sin i (M_Jup)	0.0680±0.0079	0.0425+0.0072-0.0069
e	0	0.16+0.22-0.11
P (days)	282.2+2.2-3.7	267.8+1.8-1.6
K (m/s)	2.20±0.14	1.3±0.2
a (au)	0.827±0.011	0.852+0.022-0.023
T_C (days)	2455583+54-31 (BJD)	2455250.0+24.0-20.0 (JD)

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Ancillary Information (2 Unique Files)

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+ rho CrB (2 File Types, 2 Files)

Literature Time Series (2 File Types, 2 Files)

File Type	Data Points	Filter	Reference
Photometric Light Curve	171	Hp (Hipparcos)	Hipparcos and Tycho Catalogs
Radial Velocity Curve	26	Optical Spectra	Butler et al. 2006

Nearby Data (within 30 arcseconds) Browse Nearby Data

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Known Objects: 3 Confirmed Planets; 1 2MASS Point Source Catalog

Data Files: 1 SuperWASP Time Series; 3 Associated Literature Data

Bibliography (30 References)

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Uncovering Hidden Systematics in Extreme-precision Radial Velocity Measurements
Zhao et al. 2026 Reference Overview
SPORES-HWO. II. Companion Mass Limits and Updated Planet Properties for 120 Future Exoplanet Imaging Targets from 35 yr of Precise Doppler Monitoring
Harada et al. 2025 Reference Overview
EXPRES. IV. Two Additional Planets Orbiting ρ Coronae Borealis Reveal Uncommon System Architecture
Brewer et al. 2023 Reference Overview
The California Legacy Survey. I. A Catalog of 178 Planets from Precision Radial Velocity Monitoring of 719 Nearby Stars over Three Decades
Rosenthal et al. 2021 Reference Overview
The Revised TESS Input Catalog and Candidate Target List
TICv8 Reference Overview
Gaia Data Release 2
Gaia DR2 Reference Overview
Three Temperate Neptunes Orbiting Nearby Stars
Fulton et al. 2016 Reference Overview
ExoCat-1: The Nearby Stellar Systems Catalog for Exoplanet Imaging Missions
Turnbull 2015 Reference Overview
Stellar diameters and temperatures - V. 11 newly characterized exoplanet host stars
von Braun et al. 2014 Reference Overview
All WISE Data Release
Cutri et al. 2014 Reference Overview
Mass constraints on substellar companion candidates from the re-reduced Hipparcos intermediate astrometric data: nine confirmed planets and two confirmed brown dwarfs
Reffert & Quirrenbach 2011 Reference Overview
Validation of the new Hipparcos reduction
van Leeuwen et al. 2007 Reference Overview
Structure and Evolution of Nearby Stars with Planets. II. Physical Properties of ~1000 Cool Stars from the SPOCS Catalog
Takeda et al. 2007 Reference Overview
Catalog of Nearby Exoplanets
Butler et al. 2006 Reference Overview
Spectroscopic Properties of Cool Stars (SPOCS). I. 1040 F, G, and K Dwarfs from Keck, Lick, and AAT Planet Search Programs
Valenti & Fischer 2005 Reference Overview
Chromospheric Ca II Emission in Nearby F, G, K, and M Stars
Wright et al. 2004 Reference Overview
The Geneva-Copenhagen survey of the Solar neighbourhood. Ages,metallicities and kinematix properties of ~14 000 F and G dwarfs
Nordstrom et al. 2004 Reference Overview
Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 parsecs: The Northern Sample I
Gray et al. 2003 Reference Overview
2MASS All-Sky Catalog of Point Sources
2MASS Point Source Catalog Reference Overview
Statistical properties of exoplanets. II. Metallicity, orbital parameters, and space velocities
Santos et al. 2003 Reference Overview
Radial Velocities of 889 late-type stars
Nidever et al. 2002 Reference Overview
Revised Coordinates and Proper Motions of the Stars in the Luyten Half-Second Catalog
Bakos et al. 2002 Reference Overview
Yale Trigonometric Parallaxes, Fourth Edition (van Altena+ 1995)
van Altena et al. 2001 Reference Overview
The Tycho-2 catalog of the 2.5 million brightest stars
The Tycho-2 Catalog Reference Overview
The Washington Double Star Catalog (WDS, 1996.0)
WDS Catalog Reference Overview
A Planet Orbiting the Star Rho Coronae Borealis
Noyes et al. 1997 Reference Overview
The Hipparcos and Tycho Catalogs
Hipparcos and Tycho Catalogs Reference Overview
CA II H and K measurements made at Mount Wilson Observatory, 1966-1983
Duncan et al. 1991 Reference Overview
UBVRIJKL Photometry of Bright Stars
Johnson et al. 1966 Reference Overview
The Henry Draper catalogue 0h, 1h, 2h, and 3h
Cannon & Pickering 1918 Reference Overview

Legend

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System
Star
Confirmed
Candidate
False Positive Planet
Controversial
False Positive

Aliases
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rho CrB Overview

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