Observation Sector 91

TESS Observation Sector 91 is comprised of observations made during orbits 189 and 190 of the TESS mission. Observations extend from April 9 through May 7, 2025. The regions of the sky observed are shown at right.

Pointing

The orientation of the spacecraft and camera boresights are given in the table below.

Boresight	RA	Dec	Roll	Ecliptic Longitude	Ecliptic Latitude
Spacecraft	227.041	-16.874	-105.730	229.3	0.7
Camera 1	192.451	-4.724	-22.445	193.3	0.6
Camera 2	215.174	-13.297	-18.830	217.3	0.7
Camera 3	239.317	-19.747	168.142	241.3	0.7
Camera 4	264.897	-22.788	177.559	265.3	0.6
All coordinates are degrees (J2000)

Map of TESS camera fields-of-view in ecliptic coordinates. Camera 1 is red, camera 2 is magenta, camera 3 is blue, camera 4 is green. The field of camera 4 looks distorted because it is centered on the ecliptic pole. The thin black line is the ecliptic; the thick black line is the galactic plane.

Map of TESS camera fields-of-view in celestial coordinates. Camera 1 is red, camera 2 is magenta, camera 3 is blue, camera 4 is green. The thin black line is the ecliptic; the thick black line is the galactic plane.

Targets for Sector 91

During Sector 91, 12,000 stars will be observed at two-minute cadence, up to 2,000 stars at 20-second cadence, and full-frame images will be collected every 200 seconds.

The list of targets observed at two-minute cadence are given on the Target List page. The target list includes the camera and CCD on which the target can be found, TIC ID, RA, declination, and TESS magnitude.