Rocky Worlds : Schedule

Four targets were selected for observation.

Rocky Worlds DDT : Schedule

Introduction

The Rocky Worlds DDT Program will use both JWST in the infrared and HST in the UV-to-optical to characterize rocky planets and their host M dwarfs.

On the JWST side, the program will gather time series observations aimed to detect planetary secondary eclipses (when the planet passes behind its host star from our perspective) at 15 µm using the MIRI instrument to measure thermal emission from its dayside.

On the HST side, the program will gather UV-to-optical spectra in order to characterize the high-energy output of the host M dwarf, using both the COS and STIS instruments in order to cover this broad spectral range. The versatile HST instrumentation will also allow us to view these data as time series, allowing the program to detect stellar flux variations that might arise, for example, from stellar flares.

GJ-3929 b

program information

HST (Cycles 32/33 allocation)	JWST (Cycle 3 allocation)
HST 17904 Program Information	JWST 9235 Program Information
Download the HST 17904 APT file	Download the JWST 9235 APT file

Scheduling of Eclipses

Last update : 18JUN2025

2025

JWST CYCLE 3

CYCLE 4

HST CYCLE 32

CYCLE 33

2026

CYCLE 4

CYCLE 5

CYCLE 33

CYCLE 34

2027

CYCLE 5

CYCLE 6

CYCLE 34

CYCLE 35

quick look

data analysis

mast

LTT-1445 A c

	program information
	Scheduling of Eclipses Last update : 17JUN2025 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 2025 JWST CYCLE 3 CYCLE 4 HST CYCLE 32 CYCLE 33 2026 CYCLE 4 CYCLE 5 CYCLE 33 CYCLE 34 2027 CYCLE 5 CYCLE 6 CYCLE 34 CYCLE 35
	quick look
	data analysis
	mast

LTT-1445 A b

	program information
	Scheduling of Eclipses Last update : 17JUN2025 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 2025 JWST CYCLE 3 CYCLE 4 HST CYCLE 32 CYCLE 33 2026 CYCLE 4 CYCLE 5 CYCLE 33 CYCLE 34 2027 CYCLE 5 CYCLE 6 CYCLE 34 CYCLE 35
	quick look
	data analysis
	mast

LHS-1140 b

	program information
	Scheduling of Eclipses Last update : 17JUN2025 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 2025 JWST CYCLE 3 CYCLE 4 HST CYCLE 32 CYCLE 33 2026 CYCLE 4 CYCLE 5 CYCLE 33 CYCLE 34 2027 CYCLE 5 CYCLE 6 CYCLE 34 CYCLE 35
	quick look
	data analysis
	mast

Date	Changes
June 17, 2025	Added targets GJ-3929 b, LTT-1445A b, LTT-1445A c, and LHS-1140 b
April 10, 2025	Rocky Worlds DDT website goes live
March 14, 2025	Webpage created

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