LTT 9779

Name	Orbital Separation	Planet Size	Method	Year	Reference	Disposition
LTT 9779
LTT 9779 b	0.79 d	4.72 R_⨁	Transit	2020	Jenkins et al. 2020	Confirmed Planet

LTT 9779 Stellar Parameters (5 Solutions)

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RA: 23h54m40.53s

Dec: -37d37m41.61s

Distance: 80.4373+0.3174-0.3150
pc

Parallax: 12.4034000±0.0485073 mas

Ecliptic Latitude: -33.56186 deg

Ecliptic Longitude: 341.83437 deg

Galactic Latitude: -74.1011 deg

Galactic Longitude: 348.06502 deg

Total Proper Motion: 257.2651160±0.0755009 mas/yr

Proper Motion (RA): 247.6150000±0.0764463 mas/yr

Proper Motion (Dec): -69.8008000±0.0623908 mas/yr

Photometry: m_V
9.79±0.03; m_TESS
9.1031±0.0060; m_J
8.446±0.024; m_H
8.153±0.024; m_Ks
8.016±0.029; m_W1
7.936±0.028; m_W2
8.014±0.021; m_W3
7.982±0.021; m_W4
7.842±0.208; m_Gaia
9.60006±0.00029; m_B
10.584±0.025

Abundances (Hypatia Catalog): [Fe/H] 0.14±0.10 dex; [C/H] 0.23±0.04 dex; [O/H] 0.15±0.09 dex; [Na/H] 0.19±0.02 dex; [Mg/H] 0.31±0.08 dex; [Al/H] 0.20±0.06 dex; [Si/H] 0.22±0.05 dex; [Ca/H] 0.22±0.06 dex; [Y/H] 0.09±0.08 dex

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

Source	Edwards et al. 2023	Jenkins et al. 2020	TICv8	Gaia DR2	ExoFOP
T_eff (K)	5480±42	5443+14-13	5374.000±124.387	5339+137-120	5422±185
L_✶ (log₁₀(L_⦿))	---	-0.17+0.02-0.03	-0.1415090	-0.13743504+0.00234888-0.00236167	---
γ (km/s)	---	---	---	-10.625780662907795±1.047902604032908	---
R_✶ (R_⦿)	0.949±0.006	0.949±0.006	0.980173	0.997735140+0.046589400-0.049291910	0.98
Metallicity (dex)	0.25±0.04 [Fe/H]	0.27±0.03 [Fe/H]	---	---	---
v sin i (km/s)	---	1.06±0.37	---	---	---
Age (Gyr)	2.0+1.3-0.9	2.0+1.3-0.9	---	---	---
ρ_✶ (g/cm³)	---	1.81+0.06-0.07	1.3923233	---	---
M_✶ (M_⦿)	1.02+0.02-0.03	1.02+0.02-0.03	0.93	---	---
log g (log₁₀(cm/s²))	4.47±0.11	4.35+0.16-0.12	4.42394	---	4.422230±0.273742
Sp. T	---	G7 V	---	---	---
P_rot (days)	<45	45	---	---	---

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LTT 9779 b Planetary Parameters (5 Solutions)

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Status: Confirmed Planet

Detected By: Orbital Brightness Modulation, Radial Velocity, Transit

Tools: Planetary Systems; Transit Prediction Service; TOI; Transit; Atmospheric Spectroscopy

Source	Jenkins et al. 2020	Edwards et al. 2023	Kokori et al. 2023	Crossfield et al. 2020	ExoFOP
T_eq (K)	1978±19	1978±19	---	---	1809.8542527756335
S (S_⨁)	---	---	---	---	1781.1555623927613
P (days)	0.7920520±0.0000093	0.79206410±0.00000014	0.79206425±0.00000028	0.79207022±0.00000069	0.7920645022021054±0.0000001261367874
R_p (R_⨁)	4.72±0.23	4.72±0.23	---	---	12.055102798704919±2.281593686837979
R_p (R_Jup)	0.421±0.021	0.421±0.021	---	---	1.0754860875712740±0.2035505054298094
δ (%)	---	---	---	---	0.156177989635001±0.004524962493348
T₁₄ (hours)	---	---	---	---	0.36561191627951817±0.07892951147895703
T_C (days)	2458354.21430±0.00025 (BJD)	2459043.310602±0.000090 (BJD-TDB)	2458724.90098±0.00013 (BJD-TDB)	2458783.51636±0.00027 (BJD-TDB)	2460933.1758389999±0.0002133990 (BJD)
R_p/R_✶	0.0455+0.0022-0.0017	---	0.0455±0.0022	0.0431±0.0011	---
a/R_✶	3.877+0.090-0.091	3.877+0.090-0.091	3.877+0.090-0.091	---	---
M_p (M_⨁)	29.32+0.78-0.81	29.32+0.78-0.81	---	---	---
M_p (M_Jup)	0.09225+0.00245-0.00255	0.09225+0.00245-0.00255	---	---	---
e	0	<0.058	---	---	---
i (deg)	76.39±0.43	76.39±0.43	76.39±0.43	---	---
ω (deg)	90	---	---	---	---
ρ (g/cm³)	1.536±0.123	---	---	---	---
K (m/s)	19.65±0.43	---	---	---	---
a (au)	0.01679+0.00014-0.00012	---	---	---	---

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Ancillary Information (1 Unique File)

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+ LTT 9779 (1 File Type, 1 File)

Literature Time Series (1 File Type, 1 File)

File Type	Data Points	Filter	Reference
Photometric Light Curve	132	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: 4 KELT Time Series; 2 SuperWASP Time Series; 1 Associated Literature Data

Bibliography (15 References)

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Highly reflective white clouds on the western dayside of an exo-Neptune
Coulombe et al. 2025 Reference Overview
Muted Features in the JWST NIRISS Transmission Spectrum of Hot Neptune LTT 9779b
Radica et al. 2024 Reference Overview
Characterizing a World Within the Hot-Neptune Desert: Transit Observations of LTT 9779 b with the Hubble Space Telescope/WFC3
Edwards et al. 2023 Reference Overview
ExoClock Project. III. 450 New Exoplanet Ephemerides from Ground and Space Observations
Kokori et al. 2023 Reference Overview
Phase Curves of Hot Neptune LTT 9779b Suggest a High-metallicity Atmosphere
Crossfield et al. 2020 Reference Overview
Spitzer Reveals Evidence of Molecular Absorption in the Atmosphere of the Hot Neptune LTT 9779b
Dragomir et al. 2020 Reference Overview
An ultrahot Neptune in the Neptune desert
Jenkins 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
ExoFOP TOI Table
ExoFOP
All WISE Data Release
Cutri et al. 2014 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 Hipparcos and Tycho Catalogs
Hipparcos and Tycho Catalogs 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_2.0/5/LTT_9779.json

Catalog Parameters

RA

ra

23h54m40.53s

Dec

dec

-37d37m41.61s

β

elat

-33.56186

λ

elon

341.83437

b

glat

-74.1011

l

glon

348.06502

m_V

sy_vmag

9.79±0.03

m_TESS

sy_tmag

9.1031±0.0060

m_J

sy_jmag

8.446±0.024

m_H

sy_hmag

8.153±0.024

m_Ks

sy_kmag

8.016±0.029

sy_kepmag

no_data

m_W1

sy_w1mag

7.936±0.028

m_W2

sy_w2mag

8.014±0.021

m_W3

sy_w3mag

7.982±0.021

m_W4

sy_w4mag

7.842±0.208

sy_icmag

no_data

m_Gaia

sy_gaiamag

9.60006±0.00029

m_B

sy_bmag

10.584±0.025

sy_gmag

no_data

sy_imag

no_data

sy_rmag

no_data

sy_umag

no_data

sy_zmag

no_data

μ

sy_pm

257.2651160±0.0755009

μ_δ

sy_pmdec

-69.8008000±0.0623908

μ_α

sy_pmra

247.6150000±0.0764463

π

sy_plx

12.4034000±0.0485073

Distance

sy_dist

80.4373+0.3174-0.3150

Set Parameters

R_✶

st_rad

0.997735140+0.046589400-0.049291910

T_eff

st_teff

5339+137-120

LTT 9779 Overview

LTT 9779 Architecture & Discovery Information

LTT 9779