Chandra X-Ray Observatory
	(CXC)

Times of Orbital Events for Jan 1, 2013 to Jan. 1, 2014

Radiation zone passages occur between the end of one orbit and the beginning of the next. During radiation zone passages, no Chandra observations are possible due to the high particle background and the need to protect ACIS. For observations which must be tightly constrained, observers may wish to check projected estimates of usable orbit intervals (and their unusable complement during the radiation zone).

The begin and end orbit times listed below are approximate but conservative projected estimates for the actual radiation zone exit and entry times, calculated as perigee times ± 10 hours. Actual segments of orbits useful for observations are likely to be somewhat longer, but should not be shorter than the times listed here. Perigee times become less accurate as time increases from the creation date. At one year after the creation date, the perigee times are expected to be about 10 minutes off from the actual perigee time.

The date/times are provided here in Calendar (UTC) format. To convert to other date formats, please see the Date Conversion Tool page.

Earlier orbital event times can be accessed on our archived orbits pages.

OrbitBegin OrbitEnd Orbit
1852 2013 Jan 01 16:14:54.432013 Jan 03 11:42:14.03
1853 2013 Jan 04 07:42:14.032013 Jan 06 03:10:11.13
1854 2013 Jan 06 23:10:11.132013 Jan 08 18:39:44.23
1855 2013 Jan 09 14:39:44.232013 Jan 11 10:10:10.47
1856 2013 Jan 12 06:10:10.472013 Jan 14 01:39:42.64
1857 2013 Jan 14 21:39:42.642013 Jan 16 17:07:37.88
1858 2013 Jan 17 13:07:37.882013 Jan 19 08:34:57.47
1859 2013 Jan 20 04:34:57.472013 Jan 22 00:02:54.27
1860 2013 Jan 22 20:02:54.272013 Jan 24 15:31:35.09
1861 2013 Jan 25 11:31:35.092013 Jan 27 06:59:45.49
1862 2013 Jan 28 02:59:45.492013 Jan 29 22:26:51.54
1863 2013 Jan 30 18:26:51.542013 Feb 01 13:54:06.60
1864 2013 Feb 02 09:54:06.602013 Feb 04 05:22:41.26
1865 2013 Feb 05 01:22:41.262013 Feb 06 20:52:28.16
1866 2013 Feb 07 16:52:28.162013 Feb 09 12:21:56.30
1867 2013 Feb 10 08:21:56.302013 Feb 12 03:49:46.63
1868 2013 Feb 12 23:49:46.632013 Feb 14 19:16:32.26
1869 2013 Feb 15 15:16:32.262013 Feb 17 10:43:36.32
1870 2013 Feb 18 06:43:36.322013 Feb 20 02:11:29.92
1871 2013 Feb 20 22:11:29.922013 Feb 22 17:39:24.70
1872 2013 Feb 23 13:39:24.702013 Feb 25 09:06:13.28
1873 2013 Feb 26 05:06:13.282013 Feb 28 00:32:41.46
1874 2013 Feb 28 20:32:41.462013 Mar 02 16:00:21.56
1875 2013 Mar 03 12:00:21.562013 Mar 05 07:29:25.42
1876 2013 Mar 06 03:29:25.422013 Mar 07 22:58:40.88
1877 2013 Mar 08 18:58:40.882013 Mar 10 14:26:40.21
1878 2013 Mar 11 10:26:40.212013 Mar 13 05:53:15.72
1879 2013 Mar 14 01:53:15.722013 Mar 15 21:19:43.80
1880 2013 Mar 16 17:19:43.802013 Mar 18 12:47:03.33
1881 2013 Mar 19 08:47:03.332013 Mar 21 04:14:46.22
1882 2013 Mar 22 00:14:46.222013 Mar 23 19:41:41.71
1883 2013 Mar 24 15:41:41.712013 Mar 26 11:07:49.29
1884 2013 Mar 27 07:07:49.292013 Mar 29 02:34:45.86
1885 2013 Mar 29 22:34:45.862013 Mar 31 18:03:20.12
1886 2013 Apr 01 14:03:20.122013 Apr 03 09:32:32.02
1887 2013 Apr 04 05:32:32.022013 Apr 06 01:00:47.65
1888 2013 Apr 06 21:00:47.652013 Apr 08 16:27:41.08
1889 2013 Apr 09 12:27:41.082013 Apr 11 07:54:02.10
1890 2013 Apr 12 03:54:02.102013 Apr 13 23:21:03.93
1891 2013 Apr 14 19:21:03.932013 Apr 16 14:48:50.57
1892 2013 Apr 17 10:48:50.572013 Apr 19 06:16:15.17
1893 2013 Apr 20 02:16:15.172013 Apr 21 21:42:43.88
1894 2013 Apr 22 17:42:43.882013 Apr 24 13:09:26.47
1895 2013 Apr 25 09:09:26.472013 Apr 27 04:37:51.22
1896 2013 Apr 28 00:37:51.222013 Apr 29 20:07:26.29
1897 2013 Apr 30 16:07:26.292013 May 02 11:36:26.57
1898 2013 May 03 07:36:26.572013 May 05 03:04:05.97
1899 2013 May 05 23:04:05.972013 May 07 18:30:58.85
1900 2013 May 08 14:30:58.852013 May 10 09:58:14.54
1901 2013 May 11 05:58:14.542013 May 13 01:26:23.59
1902 2013 May 13 21:26:23.592013 May 15 16:54:34.26
1903 2013 May 16 12:54:34.262013 May 18 08:21:51.62
1904 2013 May 19 04:21:51.622013 May 20 23:48:50.65
1905 2013 May 21 19:48:50.652013 May 23 15:17:05.75
1906 2013 May 24 11:17:05.752013 May 26 06:46:57.33
1907 2013 May 27 02:46:57.332013 May 28 22:16:46.28
1908 2013 May 29 18:16:46.282013 May 31 13:45:11.31
1909 2013 Jun 01 09:45:11.312013 Jun 03 05:12:32.19
1910 2013 Jun 04 01:12:32.192013 Jun 05 20:39:56.39
1911 2013 Jun 06 16:39:56.392013 Jun 08 12:08:13.27
1912 2013 Jun 09 08:08:13.272013 Jun 11 03:36:50.73
1913 2013 Jun 11 23:36:50.732013 Jun 13 19:04:42.03
1914 2013 Jun 14 15:04:42.032013 Jun 16 10:31:58.76
1915 2013 Jun 17 06:31:58.762013 Jun 19 01:59:58.17
1916 2013 Jun 19 21:59:58.172013 Jun 21 17:29:33.03
1917 2013 Jun 22 13:29:33.032013 Jun 24 08:59:50.41
1918 2013 Jun 25 04:59:50.412013 Jun 27 00:28:58.40
1919 2013 Jun 27 20:28:58.402013 Jun 29 15:56:36.92
1920 2013 Jun 30 11:56:36.922013 Jul 02 07:23:59.48
1921 2013 Jul 03 03:23:59.482013 Jul 04 22:52:08.56
1922 2013 Jul 05 18:52:08.562013 Jul 07 14:20:54.17
1923 2013 Jul 08 10:20:54.172013 Jul 10 05:49:03.30
1924 2013 Jul 11 01:49:03.302013 Jul 12 21:16:25.91
1925 2013 Jul 13 17:16:25.912013 Jul 15 12:44:06.20
1926 2013 Jul 16 08:44:06.202013 Jul 18 04:13:03.67
1927 2013 Jul 19 00:13:03.672013 Jul 20 19:43:05.43
1928 2013 Jul 21 15:43:05.432013 Jul 23 11:12:37.33
1929 2013 Jul 24 07:12:37.332013 Jul 26 02:40:24.61
1930 2013 Jul 26 22:40:24.612013 Jul 28 18:07:19.52
1931 2013 Jul 29 14:07:19.522013 Jul 31 09:34:49.80
1932 2013 Aug 01 05:34:49.802013 Aug 03 01:03:06.88
1933 2013 Aug 03 21:03:06.882013 Aug 05 16:31:05.52
1934 2013 Aug 06 12:31:05.522013 Aug 08 07:58:09.93
1935 2013 Aug 09 03:58:09.932013 Aug 10 23:25:11.82
1936 2013 Aug 11 19:25:11.822013 Aug 13 14:53:14.29
1937 2013 Aug 14 10:53:14.292013 Aug 16 06:22:30.20
1938 2013 Aug 17 02:22:30.202013 Aug 18 21:51:53.47
1939 2013 Aug 19 17:51:53.472013 Aug 21 13:19:47.86
1940 2013 Aug 22 09:19:47.862013 Aug 24 04:46:18.61
1941 2013 Aug 25 00:46:18.612013 Aug 26 20:13:01.71
1942 2013 Aug 27 16:13:01.712013 Aug 29 11:40:39.67
1943 2013 Aug 30 07:40:39.672013 Sep 01 03:08:25.08
1944 2013 Sep 01 23:08:25.082013 Sep 03 18:35:19.67
1945 2013 Sep 04 14:35:19.672013 Sep 06 10:01:50.71
1946 2013 Sep 07 06:01:50.712013 Sep 09 01:29:12.13
1947 2013 Sep 09 21:29:12.132013 Sep 11 16:57:51.31
1948 2013 Sep 12 12:57:51.312013 Sep 14 08:27:00.34
1949 2013 Sep 15 04:27:00.342013 Sep 16 23:55:09.98
1950 2013 Sep 17 19:55:09.982013 Sep 19 15:21:45.36
1951 2013 Sep 20 11:21:45.362013 Sep 22 06:47:57.90
1952 2013 Sep 23 02:47:57.902013 Sep 24 22:15:04.50
1953 2013 Sep 25 18:15:04.502013 Sep 27 13:42:39.50
1954 2013 Sep 28 09:42:39.502013 Sep 30 05:09:40.83
1955 2013 Oct 01 01:09:40.832013 Oct 02 20:36:03.05
1956 2013 Oct 03 16:36:03.052013 Oct 05 12:02:53.49
1957 2013 Oct 06 08:02:53.492013 Oct 08 03:31:08.79
1958 2013 Oct 08 23:31:08.792013 Oct 10 19:00:16.56
1959 2013 Oct 11 15:00:16.562013 Oct 13 10:28:48.35
1960 2013 Oct 14 06:28:48.352013 Oct 16 01:55:54.15
1961 2013 Oct 16 21:55:54.152013 Oct 18 17:22:14.32
1962 2013 Oct 19 13:22:14.322013 Oct 21 08:49:11.16
1963 2013 Oct 22 04:49:11.162013 Oct 24 00:16:56.69
1964 2013 Oct 24 20:16:56.692013 Oct 26 15:44:28.48
1965 2013 Oct 27 11:44:28.482013 Oct 29 07:11:21.47
1966 2013 Oct 30 03:11:21.472013 Oct 31 22:38:16.85
1967 2013 Nov 01 18:38:16.852013 Nov 03 14:06:27.77
1968 2013 Nov 04 10:06:27.772013 Nov 06 05:35:56.76
1969 2013 Nov 07 01:35:56.762013 Nov 08 21:05:14.70
1970 2013 Nov 09 17:05:14.702013 Nov 11 12:33:11.58
1971 2013 Nov 12 08:33:11.582013 Nov 14 04:00:09.23
1972 2013 Nov 15 00:00:09.232013 Nov 16 19:27:19.77
1973 2013 Nov 17 15:27:19.772013 Nov 19 10:55:24.16
1974 2013 Nov 20 06:55:24.162013 Nov 22 02:23:35.71
1975 2013 Nov 22 22:23:35.712013 Nov 24 17:51:06.70
1976 2013 Nov 25 13:51:06.702013 Nov 27 09:18:21.85
1977 2013 Nov 28 05:18:21.852013 Nov 30 00:46:26.54
1978 2013 Nov 30 20:46:26.542013 Dec 02 16:15:58.24
1979 2013 Dec 03 12:15:58.242013 Dec 05 07:45:54.74
1980 2013 Dec 06 03:45:54.742013 Dec 07 23:14:37.80
1981 2013 Dec 08 19:14:37.802013 Dec 10 14:42:01.12
1982 2013 Dec 11 10:42:01.122013 Dec 13 06:09:17.80
1983 2013 Dec 14 02:09:17.802013 Dec 15 21:37:25.19
1984 2013 Dec 16 17:37:25.192013 Dec 18 13:05:58.01
1985 2013 Dec 19 09:05:58.012013 Dec 21 04:33:55.17
1986 2013 Dec 22 00:33:55.172013 Dec 23 20:01:22.46
1987 2013 Dec 24 16:01:22.462013 Dec 26 11:29:16.39
1988 2013 Dec 27 07:29:16.392013 Dec 29 02:58:24.17
1989 2013 Dec 29 22:58:24.172013 Dec 31 18:28:26.87
1990 2014 Jan 01 14:28:26.87-

Last modified: 12/14/16



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