Rocky Worlds : Targets

Rocky Worlds DDT: Targets

Introduction

To date, the Rocky Worlds DDT program has selected nine targets to perform observations: GJ 3929 b, LTT 1445 A c, LTT 1445 A b, LHS 1140 b, TOI-198 b, TOI-406 c, TOI-771 b, HD 260655 c, and TOI-244 b. JWST observations are expected to be performed to obtain secondary eclipse measurements with 15 μm photometry, while HST/UV observations are expected to be obtained to form a panchromatic spectrum of the host stars, as well as to monitor possible stellar flares.

All the targetes were drawn from the Targets Under Consideration (TUC), a list that compiles possible targets that are relevant to the DDT program. This TUC list has been curated thanks to contributions from the community, the Core Implementation Team (CIT) at STScI and the Rocky World’s DDT Scientific Advisory Committee (SAC). These very same contributions will be used to define the next set of targets to be observed by the DDT.

The TUC plot and table

Below is a plot of 80 targets that are being considered for observation by the Rocky Worlds DDT. The plot and table are interactive. Here are some instructions on using the Bokeh plot. You may also highlight targets on the table to see their location in the plot.

Download the complete TUC table
Select targets with a lasso
Zoom in
Tap an individual target
Reset to original plot
Activate hover option

The interactive plot is only available in a wider screen

Planet Earth and the Moon as seen by NASA's Voyager 1 on September 18, 1977.

Parent Star	Planet	Radius (R⊕)	Mass (M⊕)	Period (Days)	Kmag	Teff (K)	a/R★	RP /R★	Teq (K)	Priority Metric^η
GJ-3929	GJ-3929 b^Ψ	1.09	1.21	2.62	7.9	3384	16.8	0.033	584	-0.2937
Stellar Parameters Name GJ 3929 RA 15 58 18.8 hms DEC +35 24 24.3 ° ′ ″ Radius 0.32 R_☉ Mass 0.313 M_☉ Exoplanet Parameters Name GJ 3929 b Teq 584 K Period 2.62 days Radius 1.09 R_⊕ Mass 1.21 M_⊕ useful links
LTT-1445 A	LTT-1445 A c^Ψ	1.10	1.37	3.12	6.5	3340	21.1	0.036	514	-0.2283
Stellar Parameters Name LTT 1445 A RA 03 01 51.4 hms DEC −16 35 36.0 ° ′ ″ Radius 0.271 R_☉ Mass 0.257 M_☉ Exoplanet Parameters Name LTT 1445 A c Teq 514 K Period 3.12 days Radius 1.10 R_⊕ Mass 1.37 M_⊕ useful links
LTT-1445 A	LTT-1445 A b	1.32	2.73	5.36	6.5	3340	30.2	0.045	430	-0.0503
Stellar Parameters Name LTT 1445 A RA 03 01 51.4 hms DEC -16 35 36.0 ° ′ ″ Radius 0.271 R_☉ Mass 0.257 M_☉ Exoplanet Parameters Name LTT 1445 A b Teq 430 K Period 5.36 days Radius 1.32 R_⊕ Mass 2.73 M_⊕ useful links
LHS-1140	LHS-1140 b	1.73	5.6	24.74	8.8	2988	94.2	0.073	218	0.0762
Stellar Parameters Name LHS 1140 RA 00 44 59.3 hms DEC -15 16 17.5 ° ′ ″ Radius 0.22 R_☉ Mass 0.18 M_☉ Exoplanet Parameters Name LHS 1140 b Teq 218 K Period 24.74 days Radius 1.73 R_⊕ Mass 24.74 M_⊕ useful links
TOI-198	TOI-198 b	1.44	3.91	10.22	7.9	3650	49.0	0.03	368	0.1581
Stellar Parameters Name TOI-198 RA 00 09 05.16 hms DEC -27 07 18.28 ° ′ ″ Radius 0.441 R_☉ Mass 0.467 M_☉ Exoplanet Parameters Name TOI-198 b Teq 368 K Period 10.22 days Radius 1.44 R_⊕ Mass 3.91 M_⊕ useful links
TOI-406	TOI-406 c	1.32	2.08	3.31	8.8	3392	17.6	0.03	572	-0.1705
Stellar Parameters Name TOI-406 RA 03 17 03.03 hms DEC -42 14 38.94 ° ′ ″ Radius 0.410 R_☉ Mass 0.408 M_☉ Exoplanet Parameters Name TOI-406 c Teq 572 K Period 3.31 days Radius 1.32 R_⊕ Mass 2.08 M_⊕ useful links
TOI-771	TOI-771 b	1.42	2.96	2.33	9.7	3201	15.7	0.054	571	-0.2284
Stellar Parameters Name TOI-771 RA 10 56 27.33 hms DEC -72 59 06.62 ° ′ ″ Radius 0.232 R_☉ Mass 0.220 M_☉ Exoplanet Parameters Name TOI-771 b Teq 571 K Period 2.33 days Radius 1.42 R_⊕ Mass 2.96 M_⊕ useful links
HD 260655	HD 260655 c	1.53	3.09	5.71	5.9	3803	23.4	0.032	556	-0.0687
Stellar Parameters Name HD 260655 RA 06 37 09.97 hms DEC 17 33 58.57 ° ′ ″ Radius 0.439 R_☉ Mass 0.439 M_☉ Exoplanet Parameters Name HD 260655 c Teq 556 K Period 5.71 days Radius 1.53 R_⊕ Mass 3.09 M_⊕ useful links
TOI-244	TOI-244 b	1.52	2.68	7.4	8.0	3433	28.1	0.033	458	-0.0457
Stellar Parameters Name TOI-244 RA 00 42 16.74 hms DEC -36 43 04.71 ° ′ ″ Radius 0.426 R_☉ Mass 0.428 M_☉ Exoplanet Parameters Name TOI-244 b Teq 458 K Period 7.4 days Radius 1.52 R_⊕ Mass 2.68 M_⊕ useful links

Ψ : Target already in at least one JWST program; observing mode(s) may or may not include emission photometry at 15 μm.
η : The Priority Metric calculated here is used to provide an initial ranking to each target in the TUC.

Date	Changes
2025 04 Sep	Five new exoplanets were selected for observation : TOI-198 b, TOI-406 c, TOI-771 b, HD 260655 c, and TOI-244 b. The TUC list was updated (TOI-406 exoplanets b and c had their information swapped)
2025 17 Jun	Two new exoplanets selected for observation : LHS 1140b and LTT 1445Ab
2025 10 Apr	Rocky Worlds DDT website goes live
2025 14 Mar	Webpage created

Change Log

ABOUT

NEWS

TARGETS

STATUS

DATA

TEAMS

SUPPORT