V11 Saguaro Observatory, Tucson

Last update: UTC 2026-03-02 08:05:50

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 3 0 0 0 3 0 0 0 0 0
2025 8 0 0 3 5 0 0 0 0 0
2024 14 0 2 1 10 0 0 0 1 0
2023 5 0 0 1 4 0 0 0 0 0
2022 16 0 0 7 9 0 0 0 0 0
2021 7 0 0 3 3 0 0 0 1 0
2020 3 0 0 0 2 0 0 0 1 0
2019 1 0 0 1 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 2019-Y38 2017 XQ60 2019-12-21 06:19:00 NEA (H>22) CATCH
2 MPEC 2020-A109 COMET P/2019 Y3 (Catalina) 2020-01-09 19:48:00 Comet CATCH
3 MPEC 2020-O170 DAILY ORBIT UPDATE (2020 July 30) 2020-07-30 12:02:00
4 MPEC 2020-O177 DAILY ORBIT UPDATE (2020 July 31) 2020-07-31 12:03:00
5 MPEC 2021-F130 2021 FP3 2021-03-31 11:08:00 NEA (H>22) CATCH
6 MPEC 2021-J158 DAILY ORBIT UPDATE (2021 May 11) 2021-05-11 12:07:00
7 MPEC 2021-L04 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS 2021-06-01 05:18:00 Comet CATCH
8 MPEC 2021-U31 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS 2021-10-19 05:12:00 Comet CATCH
9 MPEC 2021-W85 DAILY ORBIT UPDATE (2021 November 28) 2021-11-28 12:07:00
10 MPEC 2021-W138 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS 2021-11-30 05:18:00 Comet CATCH
11 MPEC 2021-W139 DAILY ORBIT UPDATE (2021 November 30) 2021-11-30 12:09:00
12 MPEC 2022-A40 DAILY ORBIT UPDATE (2022 January 6) 2022-01-06 12:05:00
13 MPEC 2022-A65 DAILY ORBIT UPDATE (2022 January 7) 2022-01-07 12:07:00
14 MPEC 2022-B40 DAILY ORBIT UPDATE (2022 January 26) 2022-01-26 12:21:00
15 MPEC 2022-C56 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS 2022-02-04 04:24:00 Comet CATCH
16 MPEC 2022-G100 DAILY ORBIT UPDATE (2022 April 7) 2022-04-07 12:10:00
17 MPEC 2022-G166 DAILY ORBIT UPDATE (2022 April 11) 2022-04-11 12:14:00
18 MPEC 2022-H30 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS 2022-04-23 08:53:00 Comet CATCH
19 MPEC 2022-J69 DAILY ORBIT UPDATE (2022 May 9) 2022-05-09 12:08:00
20 MPEC 2022-J89 DAILY ORBIT UPDATE (2022 May 11) 2022-05-11 12:09:00
21 MPEC 2022-J99 DAILY ORBIT UPDATE (2022 May 12) 2022-05-12 12:21:00
22 MPEC 2022-K19 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS 2022-05-20 03:39:00 Comet CATCH
23 MPEC 2022-L66 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS 2022-06-08 04:25:00 Comet CATCH
24 MPEC 2022-T133 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS 2022-10-13 04:45:00 Comet CATCH
25 MPEC 2022-U177 DAILY ORBIT UPDATE (2022 October 22) 2022-10-22 12:06:00
26 MPEC 2022-V95 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS 2022-11-05 03:31:00 Comet CATCH
27 MPEC 2022-V125 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS 2022-11-11 05:30:00 Comet CATCH
28 MPEC 2023-C144 DAILY ORBIT UPDATE (2023 February 14) 2023-02-14 12:13:00
29 MPEC 2023-E39 DAILY ORBIT UPDATE (2023 March 4) 2023-03-04 12:40:00
30 MPEC 2023-R32 DAILY ORBIT UPDATE (2023 September 7) 2023-09-07 12:05:00
31 MPEC 2023-V65 DAILY ORBIT UPDATE (2023 November 6) 2023-11-06 12:09:00
32 MPEC 2023-V225 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS 2023-11-13 04:13:00 Comet CATCH
33 MPEC 2024-F34 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS 2024-03-19 18:48:00 Comet CATCH
34 MPEC 2024-G51 DAILY ORBIT UPDATE (2024 April 5) 2024-04-05 12:11:00
35 MPEC 2024-J296 DAILY ORBIT UPDATE (2024 May 13) 2024-05-13 12:03:00
36 MPEC 2024-R36 DAILY ORBIT UPDATE (2024 September 3) 2024-09-03 12:06:00
37 MPEC 2024-R222 DAILY ORBIT UPDATE (2024 September 9) 2024-09-09 12:18:00
38 MPEC 2024-R345 2024 RB22 2024-09-14 05:55:00 NEA (H>22) CATCH
39 MPEC 2024-S44 DAILY ORBIT UPDATE (2024 September 24) 2024-09-24 12:10:00
40 MPEC 2024-S59 DAILY ORBIT UPDATE (2024 September 25) 2024-09-25 12:15:00
41 MPEC 2024-T259 COMET P/2024 S2 (Rankin) 2024-10-12 03:13:00 Comet CATCH
42 MPEC 2024-U12 2024 UB 2024-10-17 19:16:00 NEA (H>22) CATCH
43 MPEC 2024-V179 DAILY ORBIT UPDATE (2024 November 13) 2024-11-13 12:22:00
44 MPEC 2024-X94 DAILY ORBIT UPDATE (2024 December 4) 2024-12-04 12:32:00
45 MPEC 2024-Y23 DAILY ORBIT UPDATE (2024 December 21) 2024-12-21 12:15:00
46 MPEC 2024-Y238 DAILY ORBIT UPDATE (2024 December 31) 2024-12-31 12:12:00
47 MPEC 2025-D28 DAILY ORBIT UPDATE (2025 February 19) 2025-02-19 12:09:00
48 MPEC 2025-M18 DAILY ORBIT UPDATE (2025 June 18) 2025-06-18 12:36:00
49 MPEC 2025-N12 3I/ATLAS = C/2025 N1 (ATLAS) 2025-07-02 21:31:00 Comet CATCH
50 MPEC 2025-O84 Comet 3I/ATLAS 2025-07-25 19:31:00 Comet CATCH
51 MPEC 2025-S298 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS 2025-09-30 17:23:00 Comet CATCH
52 MPEC 2025-W236 DAILY ORBIT UPDATE (2025 November 30) 2025-11-30 12:04:00
53 MPEC 2025-X125 DAILY ORBIT UPDATE (2025 December 12) 2025-12-12 12:12:00
54 MPEC 2025-Y64 DAILY ORBIT UPDATE (2025 December 19) 2025-12-19 12:16:00
55 MPEC 2026-A87 DAILY ORBIT UPDATE (2026 January 12) 2026-01-12 12:24:00
56 MPEC 2026-B71 DAILY ORBIT UPDATE (2026 January 18) 2026-01-18 12:05:00
57 MPEC 2026-D82 DAILY ORBIT UPDATE (2026 February 21) 2026-02-21 12:17:00

Objects Observed by This Station

Object Observations Discoveries First Obs Last Obs Magnitude MPECs
K24R22B 217 31 2024-09-12 2024-09-25 22.1 31
PK24S020 12 4 2024-09-30 2024-09-30 18.9 4
01036 12753 0 2020-07-29 2022-01-25 14.5 1417
01627 4239 0 2022-01-04 2022-01-04 14.0 1413
00433 3489 0 2020-07-30 2020-07-30 10.9 1163
03691 2241 0 2023-11-05 2023-11-06 17.2 747
54789 2238 0 2022-05-11 2022-05-11 19.4 746
11405 1992 0 2022-01-05 2022-01-05 N/A 664
90075 1599 0 2023-02-12 2023-02-12 19.0 533
n5615 1400 0 2022-05-09 2025-06-18 18.4 280
05693 1185 0 2022-05-08 2022-05-08 19.4 395
88263 1068 0 2024-09-24 2024-09-24 17.9 356
02329 957 0 2021-05-07 2021-05-07 20.4 319
17511 951 0 2022-01-04 2022-01-04 19.5 317
18882 921 0 2022-01-24 2022-01-24 20.2 307
0004P 732 0 2021-10-11 2021-11-29 14.6 122
F9857 720 0 2021-11-27 2021-11-27 20.4 240
A0756 717 0 2022-04-08 2022-04-08 20.4 239
D8175 645 0 2025-12-11 2025-12-11 20.3 215
R6049 477 0 2024-09-02 2024-09-02 20.2 159
n2143 462 0 2022-10-18 2022-10-18 19.1 154
CK20H060 432 0 2021-04-08 2022-04-21 16.3 72
0119P 417 0 2022-11-08 2022-11-08 N/A 139
f7581 408 0 2025-02-18 2025-02-18 18.5 136
G2149 399 0 2021-11-29 2021-11-29 20.6 133
CK22E030 378 0 2022-05-07 2022-05-23 11.7 63
K15R36G 363 0 2024-12-03 2024-12-03 21.7 121
K24P03N 342 0 2024-11-13 2024-11-13 16.0 114
i2243 330 0 2023-11-06 2023-11-06 17.4 110
K21C09M 273 0 2026-01-18 2026-01-18 18.4 91
N4341 255 0 2024-04-04 2024-04-04 19.1 85
0070P 234 0 2022-01-24 2022-01-24 16.5 78
K15N13U 231 0 2026-02-21 2026-02-21 19.4 77
CK21T040 228 0 2022-10-12 2022-10-12 22.0 76
K23U09N 216 0 2025-11-29 2025-11-29 17.8 72
CK21S040 207 0 2023-11-06 2023-11-06 19.0 69
CK20S040 204 0 2022-10-31 2022-10-31 N/A 68
CK23H050 192 0 2024-03-14 2024-03-14 18.0 64
K24W70Y 175 0 2024-12-20 2024-12-30 17.8 35
CK20J010 171 0 2022-01-24 2022-01-24 18.5 57
z3403 147 0 2022-04-06 2022-04-06 N/A 49
CK20T020 136 0 2021-03-31 2021-03-31 18.9 34
g2686 123 0 2026-01-11 2026-01-12 19.1 41
K24O00Y 96 0 2024-09-09 2024-09-09 22.7 32
0003I 80 0 2025-07-24 2025-07-24 16.5 40
0024P 75 0 2025-09-24 2025-09-24 14.4 25
K23Q07L 69 0 2023-09-06 2023-09-06 20.0 23
z2970 66 0 2024-05-13 2024-05-13 19.9 22
K03H32P 58 0 2025-12-18 2025-12-18 18.7 29
K23C00Z 38 0 2023-03-03 2023-03-03 19.4 19
K17X60Q 36 0 2019-12-20 2019-12-20 22.2 12
K21F03P 26 0 2021-03-31 2021-03-31 21.0 13
K24U00B 16 0 2024-10-16 2024-10-16 21.4 8
PK19Y030 14 0 2019-12-20 2019-12-20 18.2 7
0003IK25N010 4 0 2025-07-01 2025-07-02 12.8 2

List of Observers

Observer Group Total MPECs
Unknown 36
D.Rankin 21
Individual Observer Total MPECs
Unknown 36
D.Rankin 21

List of Measurers

Measurer Group Total MPECs
Unknown 54
D.Parrott, D.Rankin 3
Individual Measurer Total MPECs
Unknown 54
D.Parrott 3
D.Rankin 3

List of Facilities

Facilities Count
0.2-m f/2 reflector + CCD 1
0.2-m reflector + CCD 1
0.20-m reflector + CCD 4
0.28-m f/2.2 reflector + CCD 8
0.30-m reflector + CCD 2
Unknown 41