18 Del Overview
18 Del B
3284.00
K
18 Del
8.50
R⦿
4979.00
K
18 Del b
- Other Data
- Bibliography 16
- Exoplanet Archive Notes 2
- 18 Del B Nearby Data 3
- 18 Del Nearby Data 3
Discovery Data
| Host | Planet | Method | Year | Reference | Disposition |
|---|---|---|---|---|---|
| 18 Del | 18 Del b | Radial Velocity | 2008 | Sato et al. 2008 | Confirmed Planet |
18 Del
- This reference contains discussion regarding the stellar multiplicity of this system. (Mugrauer 2019)
- Some stellar parameter values may be biased due to companion blend (WDS Catalog)
- RA
- 20h58m25.41s
- Dec
- +10d49m52.50s
- Distance
-
74.8120+0.4725-0.4667pc
- Parallax
- 13.3388000±0.0832723 mas
- Ecliptic Latitude
- 26.77989 deg
- Ecliptic Longitude
- 320.58224 deg
- Galactic Latitude
- -21.97778 deg
- Galactic Longitude
- 58.68307 deg
- Total Proper Motion
- 59.0882723±0.1242387 mas/yr
- Proper Motion (RA)
- -49.325600±0.121922 mas/yr
- Proper Motion (Dec)
- -32.533200±0.129407 mas/yr
- Photometry
-
mV---
-
mTESS14.9412±0.0069
-
mJ12.764
-
mH12.298
-
mKs12.175±0.038
-
mW1---
-
mW2---
-
mW3---
-
mW4---
-
mGaia16.112800±0.001045
-
mB---
- RA
- 20h58m25.88s
- Dec
- +10d50m20.90s
- Distance
- 76.2220±0.6217 pc
- Parallax
- 13.092200±0.106193 mas
- Ecliptic Latitude
- 26.78678 deg
- Ecliptic Longitude
- 320.58706 deg
- Galactic Latitude
- -21.9748 deg
- Galactic Longitude
- 58.69121 deg
- Total Proper Motion
- 60.6038527±0.1566766 mas/yr
- Proper Motion (RA)
- -50.033500±0.147366 mas/yr
- Proper Motion (Dec)
- -34.197600±0.174949 mas/yr
- Photometry
-
mV5.51048±0.02300
-
mTESS4.7181±0.0067
-
mJ4.032±0.236
-
mH3.440±0.186
-
mKs3.366±0.204
-
mW13.370±0.373
-
mW22.931±0.416
-
mW33.355±0.013
-
mW43.308±0.025
-
mGaia5.2747600±0.0026539
-
mB6.430±0.018
-
Abundances
(Hypatia Catalog) -
[Fe/H] 0.06±0.16 dex
-
[C/H] -0.17±0.06 dex
-
[O/H] 0.03±0.18 dex
-
[Na/H] 0.20±0.08 dex
-
[Mg/H] 0.13±0.06 dex
-
[Al/H] 0.12±0.05 dex
-
[Si/H] 0.14±0.04 dex
-
[Ca/H] 0.16±0.08 dex
-
[Y/H] 0.17±0.08 dex
-
[BaII/H] 0.29±0.10 dex
| Source |
Teng et al. 2023 |
TICv8 | Gaia DR2 | Mortier et al. 2013 |
Kunitomo et al. 2011 |
Baines et al. 2009 |
Sato et al. 2008 |
Cannon & Pickering 1918 |
|---|---|---|---|---|---|---|---|---|
|
Teff
(K)
|
4980 | 5074.86000±9.40089 |
5083.7500+229.2500-35.0835
|
5076±38 | --- | 5054±81 | 4979±18 | --- |
|
L✶
(log10(L⦿))
|
1.634+0.061-0.043
|
--- |
1.5759354+0.0042553-0.0042974
|
--- | --- | --- | 1.602 | --- |
|
Metallicity
(dex)
|
-0.060±0.100 [Fe/H] | 0.09695040±0.01684300 [M/H] | --- | 0.0±0.0 [Fe/H] | --- | -0.10±0.12 [Fe/H] | -0.052±0.023 [Fe/H] | --- |
|
M✶
(M⦿)
|
2.10+0.13-0.09
|
--- | --- | 2.33±0.05 | 2.1±0.1 | 2.0±0.1 | 2.3 | --- |
|
R✶
(R⦿)
|
8.80+0.61-0.40
|
7.81867 |
7.911375+0.110335-0.668004
|
--- | --- | 8.0±0.3 | 8.5 | --- |
|
log g
(log10(cm/s2))
|
2.87+0.03-0.05
|
--- | --- | 3.08±0.10 | --- | --- | 2.818±0.060 | --- |
|
Sp. T
|
G6 III | --- | --- | --- | --- | G6 III | G6 III | K0 |
|
Age
(Gyr)
|
--- | --- | --- | --- | --- | 1.1±0.1 | --- | --- |
|
γ
(km/s)
|
--- | --- | 4.3454004733504039±0.1455987652142387 | --- | --- | --- | --- | --- |
- Status
- Confirmed Planet
- Detected By
- Radial Velocity
- Tools
| Source |
Teng et al. 2023 |
Kunitomo et al. 2011 |
Sato et al. 2008 |
|---|---|---|---|
|
Tp
(days)
|
2454356.1+102.9-118.2
|
--- | 2451672±18 |
|
ω
(deg)
|
64.110+28.800-57.980
|
--- | 166.1±6.5 |
|
Mp sin i
(M⨁)
|
2926+51-24
|
3127.3±95.3 | 3273.5 |
|
Mp sin i
(MJup)
|
9.207+0.160-0.077
|
9.84±0.3 | 10.3 |
|
e
|
0.024+0.007-0.018
|
--- | 0.08±0.01 |
|
P
(days)
|
982.85+1.06-0.92
|
--- | 993.3±3.2 |
|
K
(m/s)
|
114.96+1.98-0.96
|
--- | 119.4±1.3 |
|
a
(au)
|
2.476±0.002 | 2.54±0.04 | 2.6 |
Literature Time Series
(2 File Types, 2 Files)
| File Type | Data Points | Filter | Reference |
|---|---|---|---|
| Photometric Light Curve | 178 | Hp (Hipparcos) | Hipparcos and Tycho Catalogs |
| Radial Velocity Curve | 51 | Optical Spectra | Sato et al. 2008 |
- Known Objects
- 1 Confirmed Planets
- 2 2MASS Point Source Catalog
- Data Files
- 1 Associated Literature Data
- Known Objects
- 1 Confirmed Planets
- 2 2MASS Point Source Catalog
- Data Files
- 1 Associated Literature Data
-
Revisiting Planetary Systems in Okayama Planet Search Program: A new long-period planet, RV astrometry joint analysis, and multiplicity-metallicity trend around evolved stars
Teng et al. 2023 | Reference Overview -
Search for stellar companions of exoplanet host stars by exploring the second ESA-Gaia data release
Mugrauer 2019 | Reference Overview -
The Revised TESS Input Catalog and Candidate Target List
TICv8 | Reference Overview -
Gaia Data Release 2
Gaia DR2 | Reference Overview -
All WISE Data Release
Cutri et al. 2014 | Reference Overview -
New and updated stellar parameters for 71 evolved planet hosts. On the metallicity-giant planet connection
Mortier et al. 2013 | Reference Overview -
Planet Engulfment by ~1.5-3 M sun Red Giants
Kunitomo et al. 2011 | Reference Overview -
Eleven Exoplanet Host Star Angular Diameters from the Chara Array
Baines et al. 2009 | Reference Overview -
Planetary Companions around Three Intermediate-Mass G and K Giants: 18 Del, xi Aql, and HD 81688
Sato et al. 2008 | Reference Overview -
Validation of the new Hipparcos reduction
van Leeuwen et al. 2007 | 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
- System
- Star
- Confirmed
- Candidate
- False Positive Planet
- Controversial
- False Positive
- Aliases
- Data Access
- Transit Prediction Service
- Time Series
- Kepler | K2
- External Link
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