The Kepler Field

Field Location On The Sky | Machine-Readable TableStart and Stop Times For Each Quarter

Field Location On The Sky

The Kepler photometer consisted of 21 CCD modules (each with two 2200 x 1024 pixel CCDs). Each module covered 5 square degrees on the sky. The full 116 square degree field of view on the sky is illustrated below, specifically for the single field that was observed during the prime Kepler mission.  For more information on converting pixel coordinates to sky coordinates, consult Section 7.6 in the Kepler Instrument Handbook.

Image of Full Kepler Field
An image of the full Kepler field of view.
Kepler Field-of-View
A diagram of the Kepler field of view with the brightest stars in that part of the sky.

 

Machine-Readable Table

A table (morc_2_ra_dec_4_seasons.txt) that contains the corners of each Kepler CCD module is available for download in text format. Corners are provided in J2000 celestial coordinates for all four seasonal roll rotations.

Start and Stop Times For Each Quarter

NOTE: For more detailed start and stop times for the long-cadence and short-cadence runs of each Quarter, consult Table 2 and Table 3 in the DR25 release notes.  The table below contains the mid-point times of the first and last cadence of each Quarter.

Quarter Start Time (MJD) End Time (MJD) Start Time (UTC) End Time (UTC)
0

54953.03815

54962.74411

02-May-2009 00:54:56

11-May-2009 17:51:31

1

54964.01099

54997.48122

13-May-2009 00:15:50

15-Jun-2009 11:32:58

2

55002.01748

55090.96492

20-Jun-2009 00:25:10

16-Sep-2009 23:09:29

3

55092.72221

55181.99660

18-Sep-2009 17:19:59

16-Dec-2009 23:55:06

4

55184.87774

55274.70384

19-Dec-2009 21:03:56

19-Mar-2010 16:53:32

5

55275.99115

55370.66003

20-Mar-2010 23:47:16

23-Jun-2010 15:50:27

6

55371.94733

55461.79386

24-Jun-2010 22:44:09

22-Sep-2010 19:03:10

7

55462.67251

55552.04909

23-Sep-2010 16:08:24

22-Dec-2010 01:10:42

8

55567.86468

55634.84602

06-Jan-2011 20:45:09

14-Mar-2011 20:18:1

9

55641.01696

55738.42395

21-Mar-2011 00:24:25

26-Jun-2011 10:10:30

10

55739.34343

55832.76587

27-Jun-2011 08:14:33

28-Sep-2011 18:22:51

11

55833.70579

55930.82669

29-Sep-2011 16:56:20

04-Jan-2012 19:50:26

12

55931.90966

56014.52273

05-Jan-2012 21:49:55

28-Mar-2012 12:32:44

13

56015.23787

56105.55441

29-Mar-2012 05:42:32

27-Jun-2012 13:18:21

14

56106.63736

56203.81957

28-Jun-2012 15:17:48

03-Oct-2012 19:40:11

15

56205.98550

56303.63768

05-Oct-2012 23:39:07

11-Jan-2013 15:18:16

16

56304.59804

56390.46005

12-Jan-2013 14:21:11

08-Apr-2013 11:02:28

17

56391.72690

56423.50115

09-Apr-2013 17:26:45

11-May-2013 12:01:40