HD 176986 Overview
HD 176986
0.75
R⦿
5019.00
K
HD 176986 b
HD 176986 c
HD 176986 d
- Architecture
- HD 176986
- HD 176986
Discovery Data
| Host | Planet | Orbital Separation | Planet Size | Method | Year | Reference | Disposition |
|---|---|---|---|---|---|---|---|
| HD 176986 | HD 176986 b | 6.49 d | > 5.36 M⨁ | Radial Velocity | 2017 | Suárez Mascareño et al. 2018 | Confirmed Planet |
| HD 176986 | HD 176986 c | 16.81 d | > 9.75 M⨁ | Radial Velocity | 2017 | Suárez Mascareño et al. 2018 | Confirmed Planet |
| HD 176986 | HD 176986 d | 61.38 d | > 6.76 M⨁ | Radial Velocity | 2026 | Nari et al. 2026 | Confirmed Planet |
- RA
- 19h03m05.74s
- Dec
- -11d02m41.79s
- Distance
-
27.7843+0.0483-0.0481pc
- Parallax
- 35.9627000±0.0620011 mas
- Ecliptic Latitude
- 11.53326 deg
- Ecliptic Longitude
- 285.79761 deg
- Galactic Latitude
- -7.57187 deg
- Galactic Longitude
- 24.36018 deg
- Total Proper Motion
- 267.8924859±0.0821360 mas/yr
- Proper Motion (RA)
- -126.9420000±0.0900503 mas/yr
- Proper Motion (Dec)
- -235.9070000±0.0796978 mas/yr
- Photometry
-
mV8.42±0.03
-
mTESS7.5672±0.0061
-
mJ6.797±0.034
-
mH6.340±0.027
-
mKs6.220±0.031
-
mGaia8.142490±0.000548
-
mB9.316±0.000
-
Abundances
(Hypatia Catalog) -
[Fe/H] 0.09±0.06 dex
-
[C/H] 0.20±0.18 dex
-
[O/H] 0.27±0.17 dex
-
[Na/H] 0.16±0.06 dex
-
[Mg/H] 0.07±0.17 dex
-
[Al/H] 0.14±0.03 dex
-
[Si/H] 0.05±0.06 dex
-
[Ca/H] 0.08±0.04 dex
-
[Y/H] 0.22±0.08 dex
-
[BaII/H] 0.05±0.06 dex
| Source | Nari et al. 2026 | TICv8 | Gaia DR2 | Suárez Mascareño et al. 2018 | Turnbull 2015 | Sousa et al. 2008 | Gray et al. 2006 | Michigan Catalog, Vol. 5 | Cannon & Pickering 1918 |
|---|---|---|---|---|---|---|---|---|---|
|
Teff
(K)
|
4931±77 |
4985.8200+125.2350-90.6785
|
4979.0670+63.1205-81.8673
|
4931±77 | 5019 | 5018±59 | --- | --- | --- |
|
L✶
(log10(L⦿))
|
-0.480+0.034-0.037
|
-0.4529971+0.0115891-0.0105673
|
-0.45180240+0.00100087-0.00100317
|
-0.480+0.034-0.037
|
-0.481 +0.084-0.104
|
-0.480+0.034-0.037
|
--- | --- | --- |
|
M✶
(M⦿)
|
0.789±0.019 |
0.820000+0.117830-0.076271
|
--- | 0.789±0.019 | 0.75 | 0.733 | --- | --- | --- |
|
R✶
(R⦿)
|
0.782±0.035 |
0.7955750+0.0373648-0.0517407
|
0.7988321+0.0269317-0.0198752
|
0.782±0.035 | 0.75 | --- | --- | --- | --- |
|
Sp. T
|
K2.5 V | --- | --- | K2.5 V | K1/2V | --- | K2.5 V | K1/2 V | K0 |
|
Metallicity
(dex)
|
0.03±0.05 [Fe/H] | 0.00794120±0.02572480 [M/H] | --- | 0.03±0.05 [Fe/H] | --- | 0.0±0.0 [Fe/H] | --- | --- | --- |
|
v sin i
(km/s)
|
--- | --- | --- | 1.10±0.20 | --- | --- | --- | --- | --- |
|
Age
(Gyr)
|
4.3±4.0 | --- | --- | 4.3±4.0 | --- | --- | --- | --- | --- |
|
log g
(log10(cm/s2))
|
4.44±0.17 |
4.5505200+0.0616534-0.0976576
|
--- | 4.44±0.17 | --- | 4.45±0.11 | --- | --- | --- |
|
Prot
(days)
|
36.05+0.67-0.71
|
--- | --- | 35.9±0.2 | --- | --- | --- | --- | --- |
|
γ
(km/s)
|
37.42±0.14 | --- | 37.392922626572698±0.250950446134331 | --- | --- | --- | --- | --- | --- |
|
ρ✶
(g/cm3)
|
--- |
2.2958175+0.5459383-0.4977772
|
--- | --- | --- | --- | --- | --- | --- |
|
CAII LOG RHK
|
-4.90±0.04 | --- | --- | --- | --- | --- | --- | --- | --- |
- Status
- Confirmed Planet
- Detected By
- Radial Velocity
- Tools
- Planetary Systems
| Source | Nari et al. 2026 | Kiefer et al. 2021 | Suárez Mascareño et al. 2018 |
|---|---|---|---|
|
Tp
(days)
|
--- | --- |
2455502.9±1.7
(BJD)
|
|
S
(S⨁)
|
81.7+9.3-8.6
|
--- | 83.5±6.9 |
|
ω
(deg)
|
--- | --- | 249±91 |
|
Mp sin i
(M⨁)
|
5.36±0.44 | 6.363 | 5.74±0.66 |
|
Mp sin i
(MJup)
|
0.0169±0.0014 | 0.02002 | 0.0181±0.0021 |
|
e
|
--- | --- | 0.0660±0.0660 |
|
P
(days)
|
6.49164+0.00030-0.00029
|
6.490 | 6.48980±0.00086 |
|
K
(m/s)
|
2.14±0.17 | --- | 2.56±0.24 |
|
a
(au)
|
0.062956±0.000530 | --- | 0.06296±0.00013 |
|
Teq
(K)
|
767±21 | --- | --- |
|
TC
(days)
|
2460624.06±0.17
(BJD)
|
--- | --- |
|
Mp
(M⨁)
|
--- | <1488 | --- |
|
Mp
(MJup)
|
--- | <4.681 | --- |
|
i
(deg)
|
--- | >0.2581 | --- |
- Status
- Confirmed Planet
- Detected By
- Radial Velocity
- Tools
- Planetary Systems
| Source | Nari et al. 2026 | Kiefer et al. 2021 | Suárez Mascareño et al. 2018 |
|---|---|---|---|
|
Tp
(days)
|
--- | --- |
2455514.4±4.3
(BJD)
|
|
S
(S⨁)
|
22.9+2.6-2.4
|
--- | 23.5±4.5 |
|
ω
(deg)
|
--- | --- | 270±130 |
|
Mp sin i
(M⨁)
|
9.750+0.650-0.640
|
8.944 | 9.180±0.970 |
|
Mp sin i
(MJup)
|
0.03068+0.00205-0.00201
|
0.02814 | 0.02888±0.00305 |
|
e
|
--- | --- | 0.111±0.080 |
|
P
(days)
|
16.8124±0.0015 | 16.82 | 16.8191±0.0044 |
|
K
(m/s)
|
2.84±0.18 | --- | 2.63±0.27 |
|
a
(au)
|
0.118730±0.001000 | --- | 0.11878±0.00025 |
|
Teq
(K)
|
558±15 | --- | --- |
|
TC
(days)
|
2460614.69+0.32-0.31
(BJD)
|
--- | --- |
|
Mp
(M⨁)
|
--- | <2098 | --- |
|
Mp
(MJup)
|
--- | <6.601 | --- |
|
i
(deg)
|
--- | >0.2419 | --- |
- Status
- Confirmed Planet
- Detected By
- Radial Velocity
- Tools
- Planetary Systems
| Source | Nari et al. 2026 |
|---|---|
|
Teq
(K)
|
363±10 |
|
S
(S⨁)
|
4.09+0.47-0.43
|
|
Mp sin i
(M⨁)
|
6.76+0.91-0.92
|
|
Mp sin i
(MJup)
|
0.0213+0.0029-0.0029
|
|
P
(days)
|
61.376+0.051-0.049
|
|
K
(m/s)
|
1.28±0.17 |
|
a
(au)
|
0.28149±0.00240 |
|
TC
(days)
|
2460614.69+3.00-3.10
(BJD)
|
Literature Time Series
(1 File Type, 1 File)
| File Type | Data Points | Filter | Reference |
|---|---|---|---|
| Photometric Light Curve | 77 | Hp (Hipparcos) | Hipparcos and Tycho Catalogs |
- Known Objects
- 3 Confirmed Planets
- 7 2MASS Point Source Catalog
- Data Files
- 3 Associated Literature Data
-
The RoPES project with HARPS and HARPS-N: II. A third planet in the multi-planet system HD 176986
Nari et al. 2026 | Reference Overview -
Determining the true mass of radial-velocity exoplanets with Gaia. Nine planet candidates in the brown dwarf or stellar regime and 27 confirmed planets
Kiefer 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 -
The RoPES project with HARPS and HARPS-N. I. A system of super-Earths orbiting the moderately active K-dwarf HD 176986
Suárez Mascareño et al. 2018 | Reference Overview -
ExoCat-1: The Nearby Stellar Systems Catalog for Exoplanet Imaging Missions
Turnbull 2015 | Reference Overview -
Spectroscopic parameters for 451 stars in the HARPS GTO planet search program. Stellar [Fe/H] and the frequency of exo-Neptunes
Sousa et al. 2008 | Reference Overview -
Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 parsecs: The Southern Sample
Gray et al. 2006 | Reference Overview -
2MASS All-Sky Catalog of Point Sources
2MASS Point Source Catalog | Reference Overview -
The Tycho-2 catalog of the 2.5 million brightest stars
The Tycho-2 Catalog | Reference Overview -
Michigan Catalog of two-dimensional spectral types for the HD stars, Vol 5
Michigan Catalog, Vol. 5 | 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
- System
- Star
- Confirmed
- Candidate
- False Positive Planet
- Controversial
- False Positive
- Aliases
- Data Access
- Transit Prediction Service
- Time Series
- Kepler | K2
- External Link
- Search
- Browse
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