8 UMi

Name	Orbital Separation	Planet Size	Method	Year	Reference	Disposition
8 UMi
8 UMi b	93.31 d	> 524.42 M_⨁	Radial Velocity	2015	Lee et al. 2015	Confirmed Planet

Exoplanet Archive Notes (1)

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8 UMi

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

8 UMi Stellar Parameters (6 Solutions)

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RA: 14h56m48.40s

Dec: +74d54m03.38s

Distance: 162.552+0.651-0.646
pc

Parallax: 6.1230400±0.0243553 mas

Ecliptic Latitude: 73.34497 deg

Ecliptic Longitude: 130.65518 deg

Galactic Latitude: 39.66099 deg

Galactic Longitude: 112.79492 deg

Total Proper Motion: 13.2836055±0.0532098 mas/yr

Proper Motion (RA): 12.7947000±0.0538529 mas/yr

Proper Motion (Dec): 3.570690±0.044128 mas/yr

Photometry: m_V
6.83295±0.02300; m_TESS
5.96761±0.00640; m_J
5.069±0.027; m_H
4.749±0.036; m_Ks
4.515±0.020; m_W1
4.468±0.263; m_W2
4.187±0.117; m_W3
4.473±0.014; m_W4
4.415±0.026; m_Gaia
6.558960±0.000237; m_B
7.834±0.019

Abundances (Hypatia Catalog): [Fe/H] -0.23±0.04 dex; [C/H] -0.60±0.09 dex; [O/H] -0.09±0.09 dex; [Na/H] -0.15±0.04 dex; [Mg/H] -0.09±0.07 dex; [Al/H] -0.21±0.06 dex; [Si/H] -0.21±0.05 dex; [Ca/H] -0.08±0.06 dex; [Y/H] -0.06±0.08 dex; [BaII/H] -0.36±0.19 dex

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

Source	Hon et al. 2023	TICv8	Gaia DR2	Stassun et al. 2017	Lee et al. 2015	Cannon & Pickering 1918
T_eff (K)	4847±100	4906.0±122.0	4921.22+34.28-59.89	4847±7	4847.4±7.5	---
Metallicity (dex)	-0.030±0.100 [m/H]	---	---	-0.03 [Fe/H]	-0.03±0.02 [Fe/H]	---
M_✶ (M_⦿)	1.51±0.06	---	---	1.44±0.19	1.8±0.1	---
R_✶ (R_⦿)	10.73±0.14	10.1467	10.025266+0.248538-0.138221	10.30±0.57	9.90±0.40	---
log g (log₁₀(cm/s²))	---	---	---	2.57±0.03	2.57±0.03	---
L_✶ (log₁₀(L_⦿))	1.72+0.05-0.05	---	1.7251777+0.0029736-0.0029941	---	---	---
γ (km/s)	---	---	-9.2032520467235202±0.1448824629737714	---	---	---
Sp. T	---	---	---	---	K0	K0
v sin i (km/s)	---	---	---	---	3.6	---
Age (Gyr)	---	---	---	---	1.7±0.2	---

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8 UMi b Planetary Parameters (3 Solutions)

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Status: Confirmed Planet

Detected By: Radial Velocity

Tools: Planetary Systems

Source	Hon et al. 2023	Stassun et al. 2017	Lee et al. 2015
M_p sin i (M_⨁)	524±19	416±51	477±64
M_p sin i (M_Jup)	1.65±0.06	1.31±0.16	1.5±0.2
e	0.062+0.028-0.030	0.060±0.090	0.060±0.180
P (days)	93.31±0.06	93.40000±4.50000	93.4±4.5
K (m/s)	56.1+1.7-1.6	46.1±4.0	46.1±4.0
a (au)	0.462±0.006	0.49±0.02	0.49±0.03
T_p (days)	2457601.379+7.844-6.936 (BJD)	---	2454108.5±22.8 (JD)
ω (deg)	54.0+30.5-26.5	---	91.00±84.60

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Ancillary Information (1 Unique File)

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+ 8 UMi (1 File Type, 1 File)

Literature Time Series (1 File Type, 1 File)

File Type	Data Points	Filter	Reference
Photometric Light Curve	111	Hp (Hipparcos)	Hipparcos and Tycho Catalogs

Nearby Data (within 30 arcseconds) Browse Nearby Data

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

Data Files: 1 Associated Literature Data

Bibliography (11 References)

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A close-in giant planet escapes engulfment by its star
Hon et al. 2023 Reference Overview
The Revised TESS Input Catalog and Candidate Target List
TICv8 Reference Overview
Gaia Data Release 2
Gaia DR2 Reference Overview
Accurate Empirical Radii and Masses of Planets and Their Host Stars with Gaia Parallaxes
Stassun et al. 2017 Reference Overview
Search for exoplanet around northern circumpolar stars. Four planets around HD 11755, HD 12648, HD 24064, and 8 Ursae Minoris
Lee et al. 2015 Reference Overview
2MASS All-Sky Catalog of Point Sources
2MASS Point Source Catalog Reference Overview
The Hipparcos and Tycho Photometric System Passbands
Tycho 2 converted using Bessell 2000 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
The Hipparcos and Tycho Catalogs
Hipparcos and Tycho Catalogs 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
Data Access
Transit Prediction Service
Time Series
Kepler | K2

External Link
Search
Browse
Download

Debug Info

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https://vmexoweb2.ipac.caltech.edu/data/Overviews_2.0/4/8_UMi.json

Catalog Parameters

RA

ra

14h56m48.40s

Dec

dec

+74d54m03.38s

β

elat

73.34497

λ

elon

130.65518

b

glat

39.66099

l

glon

112.79492

m_V

sy_vmag

6.83295±0.02300

m_TESS

sy_tmag

5.96761±0.00640

m_J

sy_jmag

5.069±0.027

m_H

sy_hmag

4.749±0.036

m_Ks

sy_kmag

4.515±0.020

sy_kepmag

no_data

m_W1

sy_w1mag

4.468±0.263

m_W2

sy_w2mag

4.187±0.117

m_W3

sy_w3mag

4.473±0.014

m_W4

sy_w4mag

4.415±0.026

sy_icmag

no_data

m_Gaia

sy_gaiamag

6.558960±0.000237

m_B

sy_bmag

7.834±0.019

sy_gmag

no_data

sy_imag

no_data

sy_rmag

no_data

sy_umag

no_data

sy_zmag

no_data

μ

sy_pm

13.2836055±0.0532098

μ_δ

sy_pmdec

3.570690±0.044128

μ_α

sy_pmra

12.7947000±0.0538529

π

sy_plx

6.1230400±0.0243553

Distance

sy_dist

162.552+0.651-0.646

Set Parameters

R_✶

st_rad

10.30±0.57

T_eff

st_teff

4847±7

8 UMi Overview

8 UMi Architecture & Discovery Information

8 UMi