238 Grorudalen Optical Observatory

Last update: UTC 2026-03-02 05:38:09

Graphs

Yearly Breakdown of MPEC Types

Term definition:
Editorial - Editorial MPECs associated with this station.
Discovery - MPECs associated with discovery made by this station.
OrbitUpdate - MPECs associated with orbit updates involving observations made by this station. Typically, these are recoveries of single-opposition objects.
DOU - Daily Orbit Update MPECs involving observations made by this station.
ListUpdate - MPECs associated with list updates involving observations made by this station. This category has largely been retired since 2012.
Retraction - Retracted MPECs involving observations made by this station.
Followup - MPECs associated with follow-up observations made by this station to an object discovered elsewhere.
FirstFollowup - MPECs associated with follow-up observations made by this station to an object discovered elsewhere, with this station being the first station to follow-up.
Other - MPECs that do not fit into categories listed above and involve observations made by this station.

Yearly Breakdown of Discovery Object Types

Yearly Breakdown of Orbit Update Object Types

Breakdown by Observers

Breakdown by Measurers

Breakdown by Facilities

Breakdown by Objects

Annual Breakdown

Weekly Breakdown

Hourly Breakdown

Tables

Yearly Breakdown of MPEC Types

Year Total MPECs Editorial Discovery Orbit Update DOU List Update Retraction Other Follow-Up First Follow-Up
2026 1 0 0 0 1 0 0 0 0 0
2025 0 0 0 0 0 0 0 0 0 0
2024 0 0 0 0 0 0 0 0 0 0
2023 0 0 0 0 0 0 0 0 0 0
2022 0 0 0 0 0 0 0 0 0 0
2021 0 0 0 0 0 0 0 0 0 0
2020 2 0 0 0 1 0 0 0 1 0
2019 16 0 0 0 14 0 0 0 2 0
2018 30 0 0 6 24 0 0 0 0 0
2017 6 0 0 3 3 0 0 0 0 0
2016 8 0 0 3 5 0 0 0 0 0
2015 9 0 0 2 7 0 0 0 0 0
2014 9 0 0 5 4 0 0 0 0 0
2013 6 0 0 3 3 0 0 0 0 0
2012 1 0 0 1 0 0 0 0 0 0
2011 0 0 0 0 0 0 0 0 0 0
2010 0 0 0 0 0 0 0 0 0 0
2009 0 0 0 0 0 0 0 0 0 0
2008 0 0 0 0 0 0 0 0 0 0
2007 0 0 0 0 0 0 0 0 0 0
2006 0 0 0 0 0 0 0 0 0 0
2005 0 0 0 0 0 0 0 0 0 0
2004 0 0 0 0 0 0 0 0 0 0
2003 0 0 0 0 0 0 0 0 0 0
2002 0 0 0 0 0 0 0 0 0 0
2001 3 0 0 2 1 0 0 0 0 0
2000 0 0 0 0 0 0 0 0 0 0
1999 0 0 0 0 0 0 0 0 0 0
1998 0 0 0 0 0 0 0 0 0 0
1997 0 0 0 0 0 0 0 0 0 0
1996 0 0 0 0 0 0 0 0 0 0
1995 0 0 0 0 0 0 0 0 0 0
1994 0 0 0 0 0 0 0 0 0 0
1993 0 0 0 0 0 0 0 0 0 0

List of Individual MPECs

Index Name Date/Time Discoverer First-responding Confirmer Object Type Search Archival Image
1 MPEC 2001-U43 COMET C/2000 WM1 (LINEAR) 2001-10-23 22:54:00 Comet CATCH
2 MPEC 2001-V14 DAILY ORBIT UPDATE (2001 NOV. 2 UT) 2001-11-02 07:08:00
3 MPEC 2001-W08 COMET C/2000 WM1 (LINEAR) 2001-11-16 21:23:00 Comet CATCH
4 MPEC 2012-W54 OBSERVATIONS AND ORBITS OF COMETS 2012-11-27 21:00:00 Comet CATCH
5 MPEC 2013-A29 OBSERVATIONS AND ORBITS OF COMETS 2013-01-06 21:45:00 Comet CATCH
6 MPEC 2013-S29 DAILY ORBIT UPDATE (2013 SEPT. 24 UT) 2013-09-24 06:02:00
7 MPEC 2013-U73 OBSERVATIONS AND ORBITS OF COMETS 2013-10-28 23:48:00 Comet CATCH
8 MPEC 2013-U74 DAILY ORBIT UPDATE (2013 OCT. 29 UT) 2013-10-29 06:05:00
9 MPEC 2013-X24 DAILY ORBIT UPDATE (2013 DEC. 4 UT) 2013-12-04 17:33:00
10 MPEC 2013-X39 OBSERVATIONS AND ORBITS OF COMETS 2013-12-07 20:39:00 Comet CATCH
11 MPEC 2014-O31 DAILY ORBIT UPDATE (2014 JULY 25 UT) 2014-07-25 12:01:00
12 MPEC 2014-O54 OBSERVATIONS AND ORBITS OF COMETS 2014-07-28 19:45:00 Comet CATCH
13 MPEC 2014-O62 DAILY ORBIT UPDATE (2014 JULY 30 UT) 2014-07-30 12:01:00
14 MPEC 2014-P41 OBSERVATIONS AND ORBITS OF COMETS 2014-08-07 20:51:00 Comet CATCH
15 MPEC 2014-Q43 OBSERVATIONS AND ORBITS OF COMETS 2014-08-25 02:39:00 Comet CATCH
16 MPEC 2014-Q46 DAILY ORBIT UPDATE (2014 AUG. 25 UT) 2014-08-25 12:03:00
17 MPEC 2014-R79 DAILY ORBIT UPDATE (2014 SEPT. 11 UT) 2014-09-11 12:02:00
18 MPEC 2014-S34 OBSERVATIONS AND ORBITS OF COMETS 2014-09-22 18:29:00 Comet CATCH
19 MPEC 2014-U124 OBSERVATIONS AND ORBITS OF COMETS 2014-10-29 22:17:00 Comet CATCH
20 MPEC 2015-M27 DAILY ORBIT UPDATE (2015 JUNE 20 UT) 2015-06-20 12:03:00
21 MPEC 2015-O19 DAILY ORBIT UPDATE (2015 JULY 19 UT) 2015-07-19 12:02:00
22 MPEC 2015-O22 DAILY ORBIT UPDATE (2015 JULY 20 UT) 2015-07-20 12:02:00
23 MPEC 2015-Q69 DAILY ORBIT UPDATE (2015 AUG. 26 UT) 2015-08-26 12:03:00
24 MPEC 2015-Q71 OBSERVATIONS AND ORBITS OF COMETS 2015-08-27 21:49:00 Comet CATCH
25 MPEC 2015-Q74 DAILY ORBIT UPDATE (2015 AUG. 29 UT) 2015-08-29 12:06:00
26 MPEC 2015-R07 DAILY ORBIT UPDATE (2015 SEPT. 4 UT) 2015-09-04 12:01:00
27 MPEC 2015-R09 DAILY ORBIT UPDATE (2015 SEPT. 5 UT) 2015-09-05 12:01:00
28 MPEC 2015-S97 OBSERVATIONS AND ORBITS OF COMETS 2015-09-28 10:17:00 Comet CATCH
29 MPEC 2016-D09 COMET P/2010 V1 = 2015 Y2 (Ikeya-Murakami) 2016-02-16 18:50:00 Comet CATCH
30 MPEC 2016-D32 OBSERVATIONS AND ORBITS OF COMETS 2016-02-20 14:42:00 Comet CATCH
31 MPEC 2016-F43 OBSERVATIONS AND ORBITS OF COMETS 2016-03-21 10:45:00 Comet CATCH
32 MPEC 2016-N91 DAILY ORBIT UPDATE (2016 JULY 14 UT) 2016-07-14 12:04:00
33 MPEC 2016-O182 DAILY ORBIT UPDATE (2016 JULY 17 UT) 2016-07-17 12:04:00
34 MPEC 2016-O274 DAILY ORBIT UPDATE (2016 JULY 19 UT) 2016-07-19 12:04:00
35 MPEC 2016-O296 DAILY ORBIT UPDATE (2016 JULY 25 UT) 2016-07-25 12:03:00
36 MPEC 2016-P121 DAILY ORBIT UPDATE (2016 AUG. 14 UT) 2016-08-14 12:04:00
37 MPEC 2017-E59 OBSERVATIONS AND ORBITS OF COMETS 2017-03-08 23:15:00 Comet CATCH
38 MPEC 2017-H20 COMET 41P/Tuttle-Giacobini-Kresak 2017-04-20 16:30:00 Comet CATCH
39 MPEC 2017-J52 OBSERVATIONS AND ORBITS OF COMETS 2017-05-07 04:08:00 Comet CATCH
40 MPEC 2017-K94 DAILY ORBIT UPDATE (2017 MAY 31 UT) 2017-05-31 12:02:00
41 MPEC 2017-O50 DAILY ORBIT UPDATE (2017 JULY 25 UT) 2017-07-25 11:59:00
42 MPEC 2017-R60 DAILY ORBIT UPDATE (2017 SEPT. 15 UT) 2017-09-15 12:03:00
43 MPEC 2018-C79 DAILY ORBIT UPDATE (2018 FEB. 12 UT) 2018-02-12 13:05:00
44 MPEC 2018-D22 DAILY ORBIT UPDATE (2018 FEB. 19 UT) 2018-02-19 13:04:00
45 MPEC 2018-D51 DAILY ORBIT UPDATE (2018 FEB. 24 UT) 2018-02-24 13:05:00
46 MPEC 2018-D70 DAILY ORBIT UPDATE (2018 FEB. 26 UT) 2018-02-26 13:05:00
47 MPEC 2018-D89 DAILY ORBIT UPDATE (2018 FEB. 28 UT) 2018-02-28 13:03:00
48 MPEC 2018-D91 OBSERVATIONS AND ORBITS OF COMETS 2018-02-28 15:50:00 Comet CATCH
49 MPEC 2018-E02 DAILY ORBIT UPDATE (2018 MAR. 1 UT) 2018-03-01 13:05:00
50 MPEC 2018-E19 DAILY ORBIT UPDATE (2018 MAR. 5 UT) 2018-03-05 13:01:00
51 MPEC 2018-F01 DAILY ORBIT UPDATE (2018 MAR. 16 UT) 2018-03-16 12:03:00
52 MPEC 2018-F18 DAILY ORBIT UPDATE (2018 MAR. 17 UT) 2018-03-17 12:02:00
53 MPEC 2018-F37 DAILY ORBIT UPDATE (2018 MAR. 19 UT) 2018-03-19 12:03:00
54 MPEC 2018-F110 DAILY ORBIT UPDATE (2018 MAR. 23 UT) 2018-03-23 12:04:00
55 MPEC 2018-F152 OBSERVATIONS AND ORBITS OF COMETS 2018-03-29 14:48:00 Comet CATCH
56 MPEC 2018-G57 DAILY ORBIT UPDATE (2018 APR. 12 UT) 2018-04-12 12:02:00
57 MPEC 2018-L01 DAILY ORBIT UPDATE (2018 JUNE 1 UT) 2018-06-01 12:02:00
58 MPEC 2018-L03 DAILY ORBIT UPDATE (2018 JUNE 3 UT) 2018-06-03 12:02:00
59 MPEC 2018-L12 DAILY ORBIT UPDATE (2018 JUNE 5 UT) 2018-06-05 12:02:00
60 MPEC 2018-L17 DAILY ORBIT UPDATE (2018 JUNE 6 UT) 2018-06-06 12:02:00
61 MPEC 2018-L39 DAILY ORBIT UPDATE (2018 JUNE 9 UT) 2018-06-09 12:03:00
62 MPEC 2018-Q24 COMET 21P/Giacobini-Zinner 2018-08-18 00:37:00 Comet CATCH
63 MPEC 2018-Q62 COMET C/2017 S3 (PANSTARRS) 2018-08-23 05:17:00 Comet CATCH
64 MPEC 2018-R86 DAILY ORBIT UPDATE (2018 SEPT. 9 UT) 2018-09-09 12:04:00
65 MPEC 2018-R111 DAILY ORBIT UPDATE (2018 SEPT. 11 UT) 2018-09-11 12:05:00
66 MPEC 2018-R145 DAILY ORBIT UPDATE (2018 SEPT. 14 UT) 2018-09-14 12:07:00
67 MPEC 2018-S22 DAILY ORBIT UPDATE (2018 SEPT. 17 UT) 2018-09-17 12:06:00
68 MPEC 2018-S50 OBSERVATIONS AND ORBITS OF COMETS 2018-09-21 00:29:00 Comet CATCH
69 MPEC 2018-S67 DAILY ORBIT UPDATE (2018 SEPT. 28 UT) 2018-09-28 12:03:00
70 MPEC 2018-U70 OBSERVATIONS AND ORBITS OF COMETS 2018-10-25 21:24:00 Comet CATCH
71 MPEC 2018-U76 DAILY ORBIT UPDATE (2018 OCT. 28 UT) 2018-10-28 12:04:00
72 MPEC 2018-V63 DAILY ORBIT UPDATE (2018 NOV. 8 UT) 2018-11-08 13:07:00
73 MPEC 2019-A131 DAILY ORBIT UPDATE (2019 JAN. 9 UT) 2019-01-09 13:06:00
74 MPEC 2019-H13 DAILY ORBIT UPDATE (2019 APR. 17 UT) 2019-04-17 12:07:00
75 MPEC 2019-J64 DAILY ORBIT UPDATE (2019 MAY 8 UT) 2019-05-08 12:05:00
76 MPEC 2019-J141 DAILY ORBIT UPDATE (2019 MAY 15 UT) 2019-05-15 12:06:00
77 MPEC 2019-J142 OBSERVATIONS AND ORBITS OF COMETS 2019-05-15 14:22:00 Comet CATCH
78 MPEC 2019-L87 DAILY ORBIT UPDATE (2019 June 10) 2019-06-10 16:43:00
79 MPEC 2019-L88 DAILY ORBIT UPDATE (2019 June 12) 2019-06-12 01:44:00
80 MPEC 2019-P75 DAILY ORBIT UPDATE (2019 August 10) 2019-08-10 13:34:00
81 MPEC 2019-R112 DAILY ORBIT UPDATE (2019 September 13) 2019-09-13 12:09:00
82 MPEC 2019-R116 DAILY ORBIT UPDATE (2019 September 14) 2019-09-14 12:10:00
83 MPEC 2019-S13 DAILY ORBIT UPDATE (2019 September 19) 2019-09-19 12:10:00
84 MPEC 2019-S61 DAILY ORBIT UPDATE (2019 September 23) 2019-09-23 12:11:00
85 MPEC 2019-V14 DAILY ORBIT UPDATE (2019 November 2) 2019-11-02 12:01:00
86 MPEC 2019-V116 Observations and orbits of comets 2019-11-07 18:07:00 Comet CATCH
87 MPEC 2019-W168 DAILY ORBIT UPDATE (2019 November 29) 2019-11-29 12:05:00
88 MPEC 2019-Y01 DAILY ORBIT UPDATE (2019 December 16) 2019-12-16 12:08:00
89 MPEC 2020-F47 DAILY ORBIT UPDATE (2020 March 18) 2020-03-18 12:03:00
90 MPEC 2020-P19 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS 2020-08-04 23:06:00 Comet CATCH
91 MPEC 2026-C05 DAILY ORBIT UPDATE (2026 February 3) 2026-02-03 12:07:00

Objects Observed by This Station

Object Observations Discoveries First Obs Last Obs Magnitude MPECs
F4244 20160 0 2016-07-12 2016-08-11 21.7 360
0021P 12255 0 2018-07-10 2018-09-24 20.4 95
03122 6384 0 2017-09-13 2017-09-13 18.0 912
D7925 5172 0 2018-02-25 2018-03-15 19.0 431
D7170 4941 0 2019-04-14 2019-05-07 17.4 549
96590 4741 0 2018-02-16 2018-02-26 20.0 431
01627 4239 0 2018-06-07 2018-06-07 14.0 1413
03200 3411 0 2019-08-08 2019-08-08 19.3 1137
66391 3210 0 2018-05-29 2018-06-04 18.3 214
12538 2795 0 2019-05-19 2019-06-04 20.1 559
04055 2709 0 2015-07-15 2015-07-15 18.8 903
CK10S010 2556 0 2012-09-08 2012-12-03 N/A 142
86666 2547 0 2015-08-21 2015-08-23 19.8 283
01981 2148 0 2018-02-25 2018-03-21 19.0 358
03752 1904 0 2018-03-14 2018-03-16 18.4 476
G3696 1899 0 2019-11-28 2019-11-28 18.7 633
99248 1764 0 2019-09-18 2019-11-28 20.6 294
0029P 1755 0 2018-09-02 2018-09-02 16.6 585
85989 1544 0 2015-07-16 2015-07-16 18.6 386
E2781 1544 0 2013-10-10 2013-10-24 19.1 193
D8925 1440 0 2017-07-20 2017-07-24 18.5 120
R6049 1431 0 2014-08-14 2014-08-21 20.2 159
05131 1314 0 2019-04-15 2019-04-15 18.3 438
CK11J020 1199 0 2013-11-17 2014-09-04 22.2 109
K17V12R 1095 0 2018-02-25 2018-03-01 18.3 73
0064P 992 0 2018-09-02 2018-12-25 N/A 31
52768 969 0 2020-03-17 2020-03-17 21.4 323
01566 896 0 2015-06-16 2015-06-16 18.8 128
53435 882 0 2013-11-11 2013-11-11 20.7 441
K17C00S 880 0 2017-05-28 2017-05-28 20.0 110
12711 844 0 2013-10-13 2013-10-13 17.5 422
07822 819 0 2015-08-13 2015-08-13 16.6 273
E1052 810 0 2013-09-19 2013-09-20 20.9 162
G2566 810 0 2013-10-17 2013-11-25 20.9 162
CK13U04Q 798 0 2014-07-09 2014-07-12 N/A 19
CK12A020 666 0 2012-12-03 2012-12-27 19.2 74
K15FB8P 590 0 2018-09-08 2018-09-15 15.4 59
0123P 588 0 2019-02-10 2019-02-19 19.0 98
85953 588 0 2018-04-10 2018-04-10 16.1 196
87309 588 0 2014-07-23 2014-07-25 18.3 147
X3578 560 0 2014-08-19 2014-08-23 21.8 56
N7805 549 0 2019-09-13 2019-09-13 N/A 183
CK12S010 528 0 2012-12-19 2013-11-13 N/A 48
CK15V020 496 0 2016-02-28 2017-04-17 17.2 31
CK15F040 494 0 2015-08-06 2015-08-23 23.6 19
q3604 438 0 2019-01-05 2019-01-05 18.7 146
h6724 435 0 2015-08-16 2015-08-16 22.2 87
0041P 414 0 2017-04-10 2017-04-17 20.1 46
CK12F060 406 0 2013-09-30 2013-10-13 18.7 58
CK11UU5F 400 0 2012-09-12 2012-10-27 16.8 50
CK14E020 396 0 2014-08-23 2014-09-05 13.2 36
R6033 384 0 2018-02-07 2018-02-07 17.6 64
o5657 372 0 2018-02-22 2018-02-22 19.0 124
0162P 330 0 2016-02-27 2016-02-27 18.7 110
CK17M040 315 0 2018-07-24 2018-07-29 16.6 35
0038P 312 0 2018-09-12 2018-12-25 18.3 13
09950 308 0 2013-11-10 2013-11-10 20.5 154
K15J01D 282 0 2019-10-31 2019-10-31 14.6 94
E1525 249 0 2019-04-22 2019-04-22 22.2 83
B2221 248 0 2019-05-16 2019-05-16 20.4 124
G2723 243 0 2019-11-30 2019-11-30 21.7 81
CK14S020 230 0 2015-12-26 2016-02-28 21.4 23
CK15O010 222 0 2018-02-25 2018-03-15 20.1 37
m1394 222 0 2019-11-06 2019-11-06 17.1 74
CK16R020 217 0 2018-08-06 2018-08-10 22.8 31
l5967 206 0 2018-03-15 2018-03-15 N/A 103
Z4030 195 0 2019-10-04 2019-10-04 19.2 65
K01P01D 192 0 2001-10-10 2001-10-21 N/A 48
CK11F010 182 0 2012-09-23 2012-09-23 20.9 91
CK13R010 180 0 2013-11-19 2013-11-19 N/A 45
j0160 165 0 2019-09-11 2019-09-11 18.9 55
CK16N060 162 0 2018-02-22 2018-02-26 14.9 27
K19H00C 162 0 2019-05-13 2019-05-13 22.5 81
0290P 160 0 2013-10-10 2013-11-25 N/A 40
CK17S030 160 0 2018-07-16 2018-07-23 16.0 10
0168P 152 0 2012-11-18 2012-12-03 N/A 38
CK18A030 126 0 2018-12-27 2019-01-01 22.0 21
0260P 120 0 2019-10-12 2019-10-12 13.9 40
K15R35Z 118 0 2019-09-21 2019-09-21 17.5 59
K04C39K 117 0 2018-02-22 2018-02-22 15.9 39
CK14B010 110 0 2016-02-28 2016-02-28 20.3 55
q3788 108 0 2018-09-22 2018-09-22 22.4 36
CK00W01M 96 0 2001-10-03 2001-11-03 19.1 32
CK14W020 93 0 2016-02-11 2016-02-11 16.9 31
K18T02Q 93 0 2018-10-26 2018-10-26 18.6 31
CK16N040 81 0 2018-03-15 2018-03-15 18.0 27
CK13V030 68 0 2013-11-21 2013-11-21 19.7 17
o8912 50 0 2018-02-07 2018-02-07 N/A 10
CK17E040 24 0 2017-04-13 2017-04-13 7.9 4
PK10V01c 20 0 2016-02-09 2016-02-09 18.1 5

List of Observers

Observer Group Total MPECs
Unknown 63
O.Trondal 28
Individual Observer Total MPECs
Unknown 63
O.Trondal 28

List of Measurers

Measurer Group Total MPECs
Unknown 91
Individual Measurer Total MPECs
Unknown 91

List of Facilities

Facilities Count
0.35-m Schmidt-Cassegrain + CCD 4
0.61-m Cassegrain + CCD 22
0.61-m f/3.2 reflector + CCD 2
Unknown 63