R17 ATLAS-TDO

Where is this observatory?

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	P/R/FU	DOU	List Update	Retraction	Other	Follow-Up	First Follow-Up
2025	134	0	5	19	109	0	0	0	1	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	0	0	0	0	0	0	0	0	0	0
2019	0	0	0	0	0	0	0	0	0	0
2018	0	0	0	0	0	0	0	0	0	0
2017	0	0	0	0	0	0	0	0	0	0
2016	0	0	0	0	0	0	0	0	0	0
2015	0	0	0	0	0	0	0	0	0	0
2014	0	0	0	0	0	0	0	0	0	0
2013	0	0	0	0	0	0	0	0	0	0
2012	0	0	0	0	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	0	0	0	0	0	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 2025-G45 DAILY ORBIT UPDATE (2025 April 3)	2025-04-03 12:36:00
2	MPEC 2025-H89 DAILY ORBIT UPDATE (2025 April 23)	2025-04-23 12:11:00
3	MPEC 2025-H115 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS	2025-04-24 15:59:00			Comet	CATCH
4	MPEC 2025-H187 DAILY ORBIT UPDATE (2025 April 28)	2025-04-28 12:23:00
5	MPEC 2025-H195 DAILY ORBIT UPDATE (2025 April 29)	2025-04-29 12:25:00
6	MPEC 2025-H206 DAILY ORBIT UPDATE (2025 April 30)	2025-04-30 12:03:00
7	MPEC 2025-J08 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS	2025-05-01 14:58:00			Comet	CATCH
8	MPEC 2025-J12 DAILY ORBIT UPDATE (2025 May 2)	2025-05-02 12:06:00
9	MPEC 2025-J32 DAILY ORBIT UPDATE (2025 May 4)	2025-05-04 12:09:00
10	MPEC 2025-J38 2025 JB1	2025-05-05 05:26:00			NEA (18>H>22)	CATCH
11	MPEC 2025-J44 DAILY ORBIT UPDATE (2025 May 5)	2025-05-05 12:13:00
12	MPEC 2025-J66 DAILY ORBIT UPDATE (2025 May 7)	2025-05-07 12:15:00
13	MPEC 2025-J71 DAILY ORBIT UPDATE (2025 May 8)	2025-05-08 12:16:00
14	MPEC 2025-J72 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS	2025-05-08 16:12:00			Comet	CATCH
15	MPEC 2025-J76 DAILY ORBIT UPDATE (2025 May 9)	2025-05-09 12:17:00
16	MPEC 2025-J85 DAILY ORBIT UPDATE (2025 May 12)	2025-05-12 12:18:00
17	MPEC 2025-J87 DAILY ORBIT UPDATE (2025 May 13)	2025-05-13 12:20:00
18	MPEC 2025-J89 DAILY ORBIT UPDATE (2025 May 14)	2025-05-14 12:23:00
19	MPEC 2025-J91 DAILY ORBIT UPDATE (2025 May 15)	2025-05-15 12:02:00
20	MPEC 2025-J92 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS	2025-05-15 18:19:00			Comet	CATCH
21	MPEC 2025-K01 DAILY ORBIT UPDATE (2025 May 16)	2025-05-16 12:03:00
22	MPEC 2025-K06 DAILY ORBIT UPDATE (2025 May 17)	2025-05-17 12:04:00
23	MPEC 2025-K07 DAILY ORBIT UPDATE (2025 May 18)	2025-05-18 12:04:00
24	MPEC 2025-K09 DAILY ORBIT UPDATE (2025 May 19)	2025-05-19 12:05:00
25	MPEC 2025-K17 DAILY ORBIT UPDATE (2025 May 20)	2025-05-20 12:07:00
26	MPEC 2025-K38 DAILY ORBIT UPDATE (2025 May 21)	2025-05-21 12:08:00
27	MPEC 2025-K50 DAILY ORBIT UPDATE (2025 May 22)	2025-05-22 12:10:00
28	MPEC 2025-K72 DAILY ORBIT UPDATE (2025 May 24)	2025-05-24 12:04:00
29	MPEC 2025-K84 DAILY ORBIT UPDATE (2025 May 25)	2025-05-25 12:06:00
30	MPEC 2025-K95 DAILY ORBIT UPDATE (2025 May 26)	2025-05-26 12:08:00
31	MPEC 2025-K109 DAILY ORBIT UPDATE (2025 May 27)	2025-05-27 12:10:00
32	MPEC 2025-K118 DAILY ORBIT UPDATE (2025 May 28)	2025-05-28 12:13:00
33	MPEC 2025-K129 DAILY ORBIT UPDATE (2025 May 29)	2025-05-29 12:15:00
34	MPEC 2025-K136 DAILY ORBIT UPDATE (2025 May 30)	2025-05-30 12:20:00
35	MPEC 2025-K142 DAILY ORBIT UPDATE (2025 May 31)	2025-05-31 12:19:00
36	MPEC 2025-L19 DAILY ORBIT UPDATE (2025 June 3)	2025-06-03 12:22:00
37	MPEC 2025-L39 DAILY ORBIT UPDATE (2025 June 6)	2025-06-06 12:27:00
38	MPEC 2025-L46 DAILY ORBIT UPDATE (2025 June 7)	2025-06-07 12:29:00
39	MPEC 2025-L52 DAILY ORBIT UPDATE (2025 June 9)	2025-06-09 12:29:00
40	MPEC 2025-L60 DAILY ORBIT UPDATE (2025 June 10)	2025-06-10 12:28:00
41	MPEC 2025-L64 DAILY ORBIT UPDATE (2025 June 12)	2025-06-12 12:28:00
42	MPEC 2025-M10 DAILY ORBIT UPDATE (2025 June 17)	2025-06-17 12:36:00
43	MPEC 2025-M29 DAILY ORBIT UPDATE (2025 June 19)	2025-06-19 12:37:00
44	MPEC 2025-M63 DAILY ORBIT UPDATE (2025 June 22)	2025-06-22 12:41:00
45	MPEC 2025-M87 DAILY ORBIT UPDATE (2025 June 24)	2025-06-24 12:47:00
46	MPEC 2025-M101 DAILY ORBIT UPDATE (2025 June 25)	2025-06-25 12:52:00
47	MPEC 2025-M114 DAILY ORBIT UPDATE (2025 June 26)	2025-06-26 12:53:00
48	MPEC 2025-M120 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS	2025-06-26 16:33:00			Comet	CATCH
49	MPEC 2025-M139 2025 MX89	2025-06-28 04:10:00	✓		NEA (18>H>22)	CATCH
50	MPEC 2025-M147 DAILY ORBIT UPDATE (2025 June 29)	2025-06-29 12:55:00
51	MPEC 2025-M152 2025 ME90	2025-06-30 00:42:00	✓		PHAg18	CATCH
52	MPEC 2025-N01 DAILY ORBIT UPDATE (2025 July 1)	2025-07-01 12:58:00
53	MPEC 2025-N09 DAILY ORBIT UPDATE (2025 July 2)	2025-07-02 12:03:00
54	MPEC 2025-N12 3I/ATLAS = C/2025 N1 (ATLAS)	2025-07-02 21:31:00			Comet	CATCH
55	MPEC 2025-N20 DAILY ORBIT UPDATE (2025 July 3)	2025-07-03 12:05:00
56	MPEC 2025-N41 DAILY ORBIT UPDATE (2025 July 5)	2025-07-05 12:06:00
57	MPEC 2025-N49 DAILY ORBIT UPDATE (2025 July 6)	2025-07-06 12:08:00
58	MPEC 2025-N53 DAILY ORBIT UPDATE (2025 July 7)	2025-07-07 12:08:00
59	MPEC 2025-N64 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS	2025-07-07 20:51:00			Comet	CATCH
60	MPEC 2025-N86 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS	2025-07-10 20:25:00			Comet	CATCH
61	MPEC 2025-N88 DAILY ORBIT UPDATE (2025 July 11)	2025-07-11 12:15:00
62	MPEC 2025-N90 DAILY ORBIT UPDATE (2025 July 12)	2025-07-12 12:15:00
63	MPEC 2025-N99 DAILY ORBIT UPDATE (2025 July 13)	2025-07-13 12:15:00
64	MPEC 2025-N100 DAILY ORBIT UPDATE (2025 July 14)	2025-07-14 12:16:00
65	MPEC 2025-O02 DAILY ORBIT UPDATE (2025 July 16)	2025-07-16 12:02:00
66	MPEC 2025-O08 DAILY ORBIT UPDATE (2025 July 17)	2025-07-17 12:03:00
67	MPEC 2025-O24 DAILY ORBIT UPDATE (2025 July 19)	2025-07-19 12:05:00
68	MPEC 2025-O30 DAILY ORBIT UPDATE (2025 July 20)	2025-07-20 12:06:00
69	MPEC 2025-O36 DAILY ORBIT UPDATE (2025 July 21)	2025-07-21 12:07:00
70	MPEC 2025-O47 DAILY ORBIT UPDATE (2025 July 22)	2025-07-22 12:08:00
71	MPEC 2025-O57 2025 OK1	2025-07-23 06:01:00	✓		NEA (H>22)	CATCH
72	MPEC 2025-O63 DAILY ORBIT UPDATE (2025 July 23)	2025-07-23 12:10:00
73	MPEC 2025-O73 DAILY ORBIT UPDATE (2025 July 24)	2025-07-24 12:12:00
74	MPEC 2025-O116 Comet 3I/ATLAS	2025-07-28 20:09:00			Comet	CATCH
75	MPEC 2025-O146 DAILY ORBIT UPDATE (2025 July 30)	2025-07-30 12:24:00
76	MPEC 2025-O156 DAILY ORBIT UPDATE (2025 July 31)	2025-07-31 12:25:00
77	MPEC 2025-O159 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS	2025-07-31 18:52:00			Comet	CATCH
78	MPEC 2025-P51 DAILY ORBIT UPDATE (2025 August 2)	2025-08-02 12:05:00
79	MPEC 2025-P71 DAILY ORBIT UPDATE (2025 August 3)	2025-08-03 12:06:00
80	MPEC 2025-P73 2025 PN	2025-08-03 13:46:00	✓		NEA (H>22)	CATCH
81	MPEC 2025-P106 DAILY ORBIT UPDATE (2025 August 6)	2025-08-06 12:11:00
82	MPEC 2025-P110 DAILY ORBIT UPDATE (2025 August 7)	2025-08-07 12:11:00
83	MPEC 2025-P113 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS	2025-08-07 15:44:00			Comet	CATCH
84	MPEC 2025-P123 DAILY ORBIT UPDATE (2025 August 9)	2025-08-09 12:13:00
85	MPEC 2025-P131 DAILY ORBIT UPDATE (2025 August 11)	2025-08-11 12:15:00
86	MPEC 2025-P138 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS	2025-08-12 16:13:00			Comet	CATCH
87	MPEC 2025-P139 DAILY ORBIT UPDATE (2025 August 13)	2025-08-13 12:16:00
88	MPEC 2025-P146 DAILY ORBIT UPDATE (2025 August 14)	2025-08-14 12:20:00
89	MPEC 2025-P151 DAILY ORBIT UPDATE (2025 August 15)	2025-08-15 12:02:00
90	MPEC 2025-Q02 DAILY ORBIT UPDATE (2025 August 16)	2025-08-16 12:04:00
91	MPEC 2025-Q39 DAILY ORBIT UPDATE (2025 August 19)	2025-08-19 12:10:00
92	MPEC 2025-Q55 DAILY ORBIT UPDATE (2025 August 20)	2025-08-20 12:11:00
93	MPEC 2025-Q73 DAILY ORBIT UPDATE (2025 August 21)	2025-08-21 12:12:00
94	MPEC 2025-Q91 DAILY ORBIT UPDATE (2025 August 22)	2025-08-22 12:13:00
95	MPEC 2025-Q111 DAILY ORBIT UPDATE (2025 August 23)	2025-08-23 12:17:00
96	MPEC 2025-Q125 DAILY ORBIT UPDATE (2025 August 24)	2025-08-24 12:19:00
97	MPEC 2025-Q179 DAILY ORBIT UPDATE (2025 August 27)	2025-08-27 12:24:00
98	MPEC 2025-Q195 DAILY ORBIT UPDATE (2025 August 28)	2025-08-28 12:26:00
99	MPEC 2025-Q215 DAILY ORBIT UPDATE (2025 August 29)	2025-08-29 12:34:00
100	MPEC 2025-Q244 DAILY ORBIT UPDATE (2025 August 30)	2025-08-30 12:47:00
101	MPEC 2025-Q272 2025 QE16	2025-08-31 06:30:00	✓		NEA (H>22)	CATCH
102	MPEC 2025-Q281 DAILY ORBIT UPDATE (2025 August 31)	2025-08-31 12:34:00
103	MPEC 2025-R03 DAILY ORBIT UPDATE (2025 September 1)	2025-09-01 12:37:00
104	MPEC 2025-R13 DAILY ORBIT UPDATE (2025 September 2)	2025-09-02 12:47:00
105	MPEC 2025-R22 DAILY ORBIT UPDATE (2025 September 3)	2025-09-03 12:39:00
106	MPEC 2025-R39 DAILY ORBIT UPDATE (2025 September 4)	2025-09-04 12:40:00
107	MPEC 2025-R45 DAILY ORBIT UPDATE (2025 September 5)	2025-09-05 12:41:00
108	MPEC 2025-R57 DAILY ORBIT UPDATE (2025 September 6)	2025-09-06 12:42:00
109	MPEC 2025-R63 Comet 3I/ATLAS	2025-09-08 19:24:00			Comet	CATCH
110	MPEC 2025-R64 Comet C/2023 RS61 (PANSTARRS)	2025-09-08 19:44:00			Comet	CATCH
111	MPEC 2025-R69 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS	2025-09-09 19:18:00			Comet	CATCH
112	MPEC 2025-R71 DAILY ORBIT UPDATE (2025 September 10)	2025-09-10 12:45:00
113	MPEC 2025-R74 DAILY ORBIT UPDATE (2025 September 11)	2025-09-11 12:45:00
114	MPEC 2025-R78 DAILY ORBIT UPDATE (2025 September 12)	2025-09-12 12:45:00
115	MPEC 2025-R80 DAILY ORBIT UPDATE (2025 September 13)	2025-09-13 12:04:00
116	MPEC 2025-R84 DAILY ORBIT UPDATE (2025 September 14)	2025-09-14 12:04:00
117	MPEC 2025-R100 DAILY ORBIT UPDATE (2025 September 15)	2025-09-15 12:06:00
118	MPEC 2025-S17 DAILY ORBIT UPDATE (2025 September 16)	2025-09-16 12:09:00
119	MPEC 2025-S35 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS	2025-09-16 19:04:00			Comet	CATCH
120	MPEC 2025-S53 DAILY ORBIT UPDATE (2025 September 17)	2025-09-17 12:13:00
121	MPEC 2025-S133 DAILY ORBIT UPDATE (2025 September 20)	2025-09-20 12:14:00
122	MPEC 2025-S158 DAILY ORBIT UPDATE (2025 September 21)	2025-09-21 12:20:00
123	MPEC 2025-S171 DAILY ORBIT UPDATE (2025 September 22)	2025-09-22 12:21:00
124	MPEC 2025-S173 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS	2025-09-22 20:03:00			Comet	CATCH
125	MPEC 2025-S181 DAILY ORBIT UPDATE (2025 September 23)	2025-09-23 12:04:00
126	MPEC 2025-S186 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS	2025-09-23 21:10:00			Comet	CATCH
127	MPEC 2025-S199 DAILY ORBIT UPDATE (2025 September 24)	2025-09-24 12:10:00
128	MPEC 2025-S230 DAILY ORBIT UPDATE (2025 September 25)	2025-09-25 12:16:00
129	MPEC 2025-S249 DAILY ORBIT UPDATE (2025 September 26)	2025-09-26 12:18:00
130	MPEC 2025-S264 DAILY ORBIT UPDATE (2025 September 28)	2025-09-28 12:21:00
131	MPEC 2025-S280 DAILY ORBIT UPDATE (2025 September 29)	2025-09-29 12:23:00
132	MPEC 2025-S288 DAILY ORBIT UPDATE (2025 September 30)	2025-09-30 12:26:00
133	MPEC 2025-S298 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS	2025-09-30 17:23:00			Comet	CATCH
134	MPEC 2025-T16 DAILY ORBIT UPDATE (2025 October 1)	2025-10-01 12:30:00

List of Observers

Observer Group	Total MPECs
J.Licandro, J.Tonry, L.Denneau, M.Alarcon, P.Nichita	791
H.Weiland, J.Licandro, J.Tonry, L.Denneau, M.Alarcon, R.Siverd	640
H.Weiland, J.Licandro, J.Tonry, L.Denneau, M.Alarcon, P.Nichita, R.Siverd	180

Individual Observer	Total MPECs
J.Licandro	1611
J.Tonry	1611
L.Denneau	1611
M.Alarcon	1611
P.Nichita	971
H.Weiland	820
R.Siverd	820

List of Measurers

Measurer Group	Total MPECs
A.Fitzsimmons, H.Weiland, J.Licandro, J.Robinson, J.Tonry, L.Denneau, M.Alarcon, N.Erasmus, R.Siverd	640
A.Fitzsimmons, H.Weiland, J.Licandro, J.Robinson, J.Tonry, L.Denneau, M.Alarcon, N.Erasmus, P.Nichita, R.Siverd	436
A.Fitzsimmons, H.Weiland, J.Licandro, J.Robinson, J.Tonry, L.Denneau, M.Alarcon, N.Erasmus, P.Nichita, T.Ngwane	403
A.Fitzsimmons, H.Weiland, J.Licandro, J.Robinson, J.Tonry, L.Denneau, M.Alarcon, N.Erasmus, P.Nichita	132

Individual Measurer	Total MPECs
A.Fitzsimmons	1611
H.Weiland	1611
J.Licandro	1611
J.Robinson	1611
J.Tonry	1611
L.Denneau	1611
M.Alarcon	1611
N.Erasmus	1611
R.Siverd	1076
P.Nichita	971
T.Ngwane	403

List of Facilities

Facilities	Count
0.56-m f/2.2 Astrograph + CMOS	1611