U71 AHS Observatory, Castaic

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 Orbit Update DOU List Update Retraction Other Follow-Up First Follow-Up
2025 1 0 0 0 1 0 0 0 0 0
2024 0 0 0 0 0 0 0 0 0 0
2023 1 0 0 1 0 0 0 0 0 0
2022 1 0 0 0 1 0 0 0 0 0
2021 29 0 0 4 25 0 0 0 0 0
2020 60 0 0 1 54 0 0 0 5 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 2020-B72 DAILY ORBIT UPDATE (2020 January 22) 2020-01-22 12:07:00
2 MPEC 2020-B94 DAILY ORBIT UPDATE (2020 January 23) 2020-01-23 15:33:00
3 MPEC 2020-B148 DAILY ORBIT UPDATE (2020 January 25) 2020-01-25 12:12:00
4 MPEC 2020-B213 DAILY ORBIT UPDATE (2020 January 27) 2020-01-27 12:18:00
5 MPEC 2020-B275 DAILY ORBIT UPDATE (2020 January 30) 2020-01-30 12:21:00
6 MPEC 2020-C34 DAILY ORBIT UPDATE (2020 February 2) 2020-02-02 12:26:00
7 MPEC 2020-D36 DAILY ORBIT UPDATE (2020 February 18) 2020-02-18 12:10:00
8 MPEC 2020-D111 DAILY ORBIT UPDATE (2020 February 26) 2020-02-26 12:19:00
9 MPEC 2020-F01 DAILY ORBIT UPDATE (2020 March 16) 2020-03-16 12:01:00
10 MPEC 2020-F184 DAILY ORBIT UPDATE (2020 March 31) 2020-03-31 12:10:00
11 MPEC 2020-H03 DAILY ORBIT UPDATE (2020 April 16) 2020-04-16 12:03:00
12 MPEC 2020-H138 DAILY ORBIT UPDATE (2020 April 24) 2020-04-24 12:08:00
13 MPEC 2020-H211 DAILY ORBIT UPDATE (2020 April 28) 2020-04-28 12:13:00
14 MPEC 2020-J59 DAILY ORBIT UPDATE (2020 May 14) 2020-05-14 12:07:00
15 MPEC 2020-J68 COMET P/2019 LM4 (Palomar) 2020-05-14 21:12:00 Comet CATCH
16 MPEC 2020-J82 DAILY ORBIT UPDATE (2020 May 15) 2020-05-15 12:08:00
17 MPEC 2020-K02 DAILY ORBIT UPDATE (2020 May 16) 2020-05-16 12:10:00
18 MPEC 2020-K21 DAILY ORBIT UPDATE (2020 May 17) 2020-05-17 12:10:00
19 MPEC 2020-K39 DAILY ORBIT UPDATE (2020 May 18) 2020-05-18 12:11:00
20 MPEC 2020-K105 DAILY ORBIT UPDATE (2020 May 21) 2020-05-21 12:15:00
21 MPEC 2020-K159 COMET C/2020 K3 (Leonard) 2020-05-25 03:51:00 Comet CATCH
22 MPEC 2020-K216 DAILY ORBIT UPDATE (2020 May 29) 2020-05-29 12:06:00
23 MPEC 2020-L37 2020 LE 2020-06-09 16:50:00 NEA (18>H>22) CATCH
24 MPEC 2020-L60 DAILY ORBIT UPDATE (2020 June 15) 2020-06-15 12:04:00
25 MPEC 2020-N25 DAILY ORBIT UPDATE (2020 July 8) 2020-07-08 12:03:00
26 MPEC 2020-N26 DAILY ORBIT UPDATE (2020 July 9) 2020-07-09 12:04:00
27 MPEC 2020-N32 DAILY ORBIT UPDATE (2020 July 10) 2020-07-10 12:06:00
28 MPEC 2020-N46 DAILY ORBIT UPDATE (2020 July 12) 2020-07-12 12:09:00
29 MPEC 2020-N54 DAILY ORBIT UPDATE (2020 July 13) 2020-07-13 12:10:00
30 MPEC 2020-N66 DAILY ORBIT UPDATE (2020 July 15) 2020-07-15 12:14:00
31 MPEC 2020-O05 DAILY ORBIT UPDATE (2020 July 16) 2020-07-16 12:15:00
32 MPEC 2020-O09 DAILY ORBIT UPDATE (2020 July 17) 2020-07-17 12:15:00
33 MPEC 2020-O34 2020 ON 2020-07-20 00:21:00 PHAg18 CATCH
34 MPEC 2020-O39 DAILY ORBIT UPDATE (2020 July 20) 2020-07-20 12:19:00
35 MPEC 2020-O85 DAILY ORBIT UPDATE (2020 July 24) 2020-07-24 12:22:00
36 MPEC 2020-O103 DAILY ORBIT UPDATE (2020 July 25) 2020-07-25 12:23:00
37 MPEC 2020-O151 DAILY ORBIT UPDATE (2020 July 29) 2020-07-29 12:01:00
38 MPEC 2020-P09 DAILY ORBIT UPDATE (2020 August 2) 2020-08-02 12:04:00
39 MPEC 2020-P14 DAILY ORBIT UPDATE (2020 August 3) 2020-08-03 12:05:00
40 MPEC 2020-P19 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS 2020-08-04 23:06:00 Comet CATCH
41 MPEC 2020-P21 DAILY ORBIT UPDATE (2020 August 6) 2020-08-06 12:05:00
42 MPEC 2020-Q146 DAILY ORBIT UPDATE (2020 August 21) 2020-08-21 12:11:00
43 MPEC 2020-Q205 DAILY ORBIT UPDATE (2020 August 27) 2020-08-27 12:01:00
44 MPEC 2020-S253 DAILY ORBIT UPDATE (2020 September 30) 2020-09-30 12:04:00
45 MPEC 2020-U37 DAILY ORBIT UPDATE (2020 October 17) 2020-10-17 12:40:00
46 MPEC 2020-U119 DAILY ORBIT UPDATE (2020 October 19) 2020-10-19 12:43:00
47 MPEC 2020-U132 DAILY ORBIT UPDATE (2020 October 20) 2020-10-20 12:46:00
48 MPEC 2020-U266 DAILY ORBIT UPDATE (2020 October 30) 2020-10-30 12:10:00
49 MPEC 2020-V92 DAILY ORBIT UPDATE (2020 November 12) 2020-11-12 12:08:00
50 MPEC 2020-V143 DAILY ORBIT UPDATE (2020 November 14) 2020-11-14 12:09:00
51 MPEC 2020-W26 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS 2020-11-17 07:41:00 Comet CATCH
52 MPEC 2020-W27 DAILY ORBIT UPDATE (2020 November 17) 2020-11-17 12:04:00
53 MPEC 2020-W62 DAILY ORBIT UPDATE (2020 November 18) 2020-11-18 12:02:00
54 MPEC 2020-W71 DAILY ORBIT UPDATE (2020 November 19) 2020-11-19 12:03:00
55 MPEC 2020-W135 DAILY ORBIT UPDATE (2020 November 24) 2020-11-24 12:07:00
56 MPEC 2020-W164 DAILY ORBIT UPDATE (2020 November 26) 2020-11-26 12:08:00
57 MPEC 2020-W190 DAILY ORBIT UPDATE (2020 November 30) 2020-11-30 12:11:00
58 MPEC 2020-Y56 DAILY ORBIT UPDATE (2020 December 20) 2020-12-20 12:30:00
59 MPEC 2020-Y65 DAILY ORBIT UPDATE (2020 December 21) 2020-12-21 12:31:00
60 MPEC 2020-Y94 DAILY ORBIT UPDATE (2020 December 22) 2020-12-22 12:33:00
61 MPEC 2021-A28 DAILY ORBIT UPDATE (2021 January 5) 2021-01-05 12:04:00
62 MPEC 2021-A71 DAILY ORBIT UPDATE (2021 January 8) 2021-01-08 12:13:00
63 MPEC 2021-A138 DAILY ORBIT UPDATE (2021 January 11) 2021-01-11 12:12:00
64 MPEC 2021-A190 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS 2021-01-15 00:38:00 Comet CATCH
65 MPEC 2021-B55 DAILY ORBIT UPDATE (2021 January 18) 2021-01-18 12:23:00
66 MPEC 2021-B69 DAILY ORBIT UPDATE (2021 January 19) 2021-01-19 12:02:00
67 MPEC 2021-B84 DAILY ORBIT UPDATE (2021 January 20) 2021-01-20 12:02:00
68 MPEC 2021-B110 DAILY ORBIT UPDATE (2021 January 22) 2021-01-22 12:02:00
69 MPEC 2021-B121 DAILY ORBIT UPDATE (2021 January 23) 2021-01-23 12:02:00
70 MPEC 2021-B143 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS 2021-01-31 04:56:00 Comet CATCH
71 MPEC 2021-C01 DAILY ORBIT UPDATE (2021 February 1) 2021-02-01 13:41:00
72 MPEC 2021-C17 DAILY ORBIT UPDATE (2021 February 4) 2021-02-04 12:02:00
73 MPEC 2021-C123 DAILY ORBIT UPDATE (2021 February 9) 2021-02-09 12:09:00
74 MPEC 2021-D54 DAILY ORBIT UPDATE (2021 February 19) 2021-02-19 12:23:00
75 MPEC 2021-D69 DAILY ORBIT UPDATE (2021 February 20) 2021-02-20 12:23:00
76 MPEC 2021-D90 DAILY ORBIT UPDATE (2021 February 23) 2021-02-23 12:26:00
77 MPEC 2021-E49 DAILY ORBIT UPDATE (2021 March 7) 2021-03-07 12:37:00
78 MPEC 2021-F20 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS 2021-03-18 05:58:00 Comet CATCH
79 MPEC 2021-F47 DAILY ORBIT UPDATE (2021 March 20) 2021-03-20 12:03:00
80 MPEC 2021-G03 DAILY ORBIT UPDATE (2021 April 1) 2021-04-01 12:02:00
81 MPEC 2021-G163 DAILY ORBIT UPDATE (2021 April 12) 2021-04-12 12:13:00
82 MPEC 2021-G201 DAILY ORBIT UPDATE (2021 April 14) 2021-04-14 12:15:00
83 MPEC 2021-H73 DAILY ORBIT UPDATE (2021 April 19) 2021-04-19 12:20:00
84 MPEC 2021-J28 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS 2021-05-03 06:02:00 Comet CATCH
85 MPEC 2021-J210 DAILY ORBIT UPDATE (2021 May 14) 2021-05-14 12:10:00
86 MPEC 2021-M91 DAILY ORBIT UPDATE (2021 June 26) 2021-06-26 12:21:00
87 MPEC 2021-S36 DAILY ORBIT UPDATE (2021 September 18) 2021-09-18 12:16:00
88 MPEC 2021-S39 DAILY ORBIT UPDATE (2021 September 19) 2021-09-19 12:17:00
89 MPEC 2021-Y76 DAILY ORBIT UPDATE (2021 December 31) 2021-12-31 12:01:00
90 MPEC 2022-A179 DAILY ORBIT UPDATE (2022 January 14) 2022-01-14 12:15:00
91 MPEC 2023-H227 COMET P/2010 OE101 = P/2021 LJ31 (WISE) 2023-04-28 06:34:00 Comet CATCH
92 MPEC 2025-A159 DAILY ORBIT UPDATE (2025 January 10) 2025-01-10 13:42:00

Objects Observed by This Station (99 total)

Object Observations Discoveries First Obs Last Obs Magnitude MPECs
01036 12564 0 2020-11-29 2021-01-18 10.8 1396
D7199 5778 0 2020-05-14 2020-06-15 20.6 321
G3373 4876 0 2020-01-22 2020-02-06 21.2 92
52768 3972 0 2020-01-18 2020-01-19 21.4 331
85628 3290 0 2020-04-28 2020-05-21 18.1 658
40267 2950 0 2020-02-15 2020-02-19 18.0 590
53435 2730 0 2020-10-16 2020-11-18 20.4 455
05879 2584 0 2021-02-22 2021-04-19 20.2 323
89355 2382 0 2020-12-20 2021-02-19 18.9 397
h7316 2380 0 2020-01-06 2020-01-24 18.2 68
21088 2379 0 2020-10-29 2020-10-29 17.3 793
88188 2160 0 2021-03-19 2021-03-31 20.1 360
D6874 2040 0 2020-05-21 2020-06-15 N/A 255
86667 2030 0 2020-05-13 2020-05-17 15.2 290
05587 1944 0 2020-11-17 2020-11-17 20.3 648
0029P 1812 0 2020-11-15 2020-11-15 16.4 604
I4990 1716 0 2020-05-17 2020-05-29 20.5 286
99942 1704 0 2021-02-08 2021-02-22 15.2 284
85184 1452 0 2020-05-12 2020-05-29 21.4 132
c2503 1305 0 2020-07-06 2020-07-20 17.0 87
04503 1248 0 2021-01-03 2021-01-30 20.8 208
K06H00B 1233 0 2020-07-15 2020-08-06 18.3 137
02368 1146 0 2020-12-21 2020-12-21 20.6 382
g0302 1104 0 2020-07-20 2020-08-03 16.2 184
o0094 1098 0 2020-02-26 2020-08-05 20.1 122
08037 1068 0 2020-10-29 2020-10-29 20.2 356
05836 1038 0 2020-11-11 2020-11-11 19.4 346
X3555 912 0 2020-01-06 2020-01-07 18.7 114
86450 888 0 2020-01-26 2020-01-26 18.5 222
G3902 885 0 2021-01-21 2021-01-21 20.4 295
c8945 690 0 2020-04-28 2020-04-28 19.0 230
K14L21W 680 0 2020-07-15 2020-08-06 17.5 85
D7064 654 0 2020-04-16 2020-04-24 22.4 109
G2186 627 0 2021-01-19 2021-01-19 19.2 209
b3428 624 0 2020-03-31 2020-04-16 19.2 78
U3174 615 0 2021-09-18 2021-09-18 18.2 205
K10ED5C 555 0 2020-07-15 2020-07-20 18.6 111
66272 528 0 2020-11-11 2020-11-11 18.8 176
Y9063 528 0 2020-07-12 2020-07-13 22.1 88
R1480 522 0 2021-04-19 2021-04-19 20.9 174
H4050 492 0 2021-02-19 2021-02-19 20.2 164
G4201 432 0 2021-04-18 2021-04-18 21.6 144
X1471 430 0 2020-06-15 2020-06-15 19.0 215
G3693 429 0 2021-01-17 2021-01-17 17.6 143
H5189 396 0 2020-05-21 2020-05-21 16.5 198
h8902 393 0 2021-02-03 2021-02-03 22.6 131
90147 369 0 2021-01-17 2021-01-17 20.8 123
F4302 351 0 2020-10-19 2020-10-19 22.8 117
F2978 342 0 2020-11-17 2020-11-17 20.3 114
K13P06Y 339 0 2020-10-18 2020-10-18 19.4 113
0099P 333 0 2021-03-05 2021-03-05 N/A 111
K06N00L 312 0 2020-07-10 2020-07-13 19.2 52
K03Y01M 309 0 2021-02-03 2021-02-03 20.6 103
K02T67S 288 0 2020-11-25 2020-11-25 20.8 96
CK17B030 282 0 2020-10-18 2020-11-07 N/A 47
K19A05N 282 0 2020-08-02 2020-08-02 17.3 94
K01G02S 270 0 2020-03-31 2020-04-16 18.0 45
K08B22C 261 0 2021-04-11 2021-04-12 18.3 87
K01Y03U 243 0 2021-04-12 2021-04-12 18.9 81
r9940 237 0 2020-04-28 2020-04-28 N/A 79
K21L15N 234 0 2021-09-16 2021-09-16 17.8 78
h1775 234 0 2020-07-16 2020-07-20 19.0 39
h3992 232 0 2020-05-14 2020-05-14 17.6 58
K00K00A 210 0 2020-05-14 2020-05-17 15.5 35
0257P 201 0 2020-07-29 2020-07-29 21.1 67
c2625 192 0 2020-08-27 2020-08-27 20.4 64
K10JF3V 180 0 2020-07-17 2020-07-17 21.2 60
K17BC3M 165 0 2020-02-25 2020-02-25 17.6 55
K20X06U 165 0 2021-01-21 2021-01-21 22.2 55
K20S01T 159 0 2020-11-23 2020-11-23 16.9 53
l7885 158 0 2020-06-15 2020-06-15 21.8 79
K03A23F 153 0 2021-01-10 2021-01-10 N/A 51
K04T01P 147 0 2021-04-11 2021-04-11 19.2 49
f8797 138 0 2020-11-13 2020-11-13 N/A 46
I9040 135 0 2021-01-17 2021-01-17 21.5 45
c0929 132 0 2020-11-16 2020-11-16 22.5 44
K20M00X 125 0 2020-07-16 2020-07-17 20.3 25
n8066 118 0 2020-05-17 2020-05-17 17.1 59
K13X22A 112 0 2020-05-29 2020-05-29 N/A 28
K20O00D 108 0 2020-07-25 2020-07-28 16.5 18
0156P 102 0 2021-03-29 2021-03-29 22.1 34
K16P00N 102 0 2020-07-24 2020-07-24 15.8 34
K20G02D 90 0 2020-04-24 2020-04-24 N/A 30
K16Y00M 81 0 2020-12-19 2020-12-19 21.1 27
K21A02L 81 0 2021-02-18 2021-02-18 21.2 27
0277P 78 0 2021-01-03 2021-01-09 16.9 13
0011P 72 0 2020-11-08 2020-11-08 15.3 24
PK20U020 72 0 2021-01-09 2021-01-17 N/A 8
o1647 72 0 2020-12-20 2020-12-20 16.5 24
K20L00E 65 0 2020-06-08 2020-06-08 21.4 13
k8727 63 0 2021-02-03 2021-02-03 N/A 21
CK20K030 50 0 2020-05-23 2020-05-23 22.1 10
CK21A040 48 0 2021-02-03 2021-03-04 15.2 8
K20H09G 46 0 2020-05-14 2020-05-14 20.8 23
PK19L04M 40 0 2020-05-13 2020-05-13 N/A 5
K20O01L 36 0 2020-07-23 2020-07-23 19.3 9
0409P 30 0 2021-01-17 2021-01-17 16.9 10
K20O00N 18 0 2020-07-19 2020-07-19 19.6 6
PK10OA1E 3 0 2021-09-16 2021-09-16 21.4 1

List of Observers

Observer Group Total MPECs
Unknown 81
M.Forslund 8
M.Forslund, S.Deen 3
Individual Observer Total MPECs
Unknown 81
M.Forslund 11
S.Deen 3

List of Measurers

Measurer Group Total MPECs
Unknown 89
S.Deen 3
Individual Measurer Total MPECs
Unknown 89
S.Deen 3

List of Facilities

Facilities Count
0.36-m f/2.2 reflector + CCD 7
0.68-m f/2.0 reflector + CCD 3
0.79-m reflector + CCD 1
Unknown 81