U63 Burnt Tree Hill Observatory, Cle Elum

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	18	0	0	0	4	0	0	0	12	2
2024	5	0	0	0	3	0	0	0	2	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	16	0	2	1	11	0	0	0	2	0
2019	12	0	0	0	6	0	0	0	6	0
2018	18	0	0	1	13	0	0	0	4	0
2017	3	0	0	0	3	0	0	0	0	0
2016	1	0	0	0	1	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 2016-X98 DAILY ORBIT UPDATE (2016 DEC. 15 UT)	2016-12-15 13:06:00
2	MPEC 2017-P44 DAILY ORBIT UPDATE (2017 AUG. 13 UT)	2017-08-13 12:04:00
3	MPEC 2017-V04 DAILY ORBIT UPDATE (2017 NOV. 1 UT)	2017-11-01 12:07:00
4	MPEC 2017-V07 DAILY ORBIT UPDATE (2017 NOV. 3 UT)	2017-11-03 12:07:00
5	MPEC 2018-F37 DAILY ORBIT UPDATE (2018 MAR. 19 UT)	2018-03-19 12:03:00
6	MPEC 2018-J76 DAILY ORBIT UPDATE (2018 MAY 14 UT)	2018-05-14 12:06:00
7	MPEC 2018-L07 DAILY ORBIT UPDATE (2018 JUNE 4 UT)	2018-06-04 12:02:00
8	MPEC 2018-M99 DAILY ORBIT UPDATE (2018 JUNE 26 UT)	2018-06-26 12:03:00
9	MPEC 2018-N20 DAILY ORBIT UPDATE (2018 JULY 6 UT)	2018-07-06 12:06:00
10	MPEC 2018-N32 DAILY ORBIT UPDATE (2018 JULY 9 UT)	2018-07-09 12:05:00
11	MPEC 2018-N79 2018 NU3	2018-07-14 16:30:00			NEA (18>H>22)	CATCH
12	MPEC 2018-O28 DAILY ORBIT UPDATE (2018 JULY 19 UT)	2018-07-19 12:03:00
13	MPEC 2018-O36 DAILY ORBIT UPDATE (2018 JULY 22 UT)	2018-07-22 12:03:00
14	MPEC 2018-P10 DAILY ORBIT UPDATE (2018 AUG. 5 UT)	2018-08-05 12:03:00
15	MPEC 2018-Q38 DAILY ORBIT UPDATE (2018 AUG. 19 UT)	2018-08-19 12:04:00
16	MPEC 2018-R08 DAILY ORBIT UPDATE (2018 SEPT. 3 UT)	2018-09-03 12:11:00
17	MPEC 2018-S25 2018 RP8	2018-09-18 02:49:00			NEA (18>H>22)	CATCH
18	MPEC 2018-S50 OBSERVATIONS AND ORBITS OF COMETS	2018-09-21 00:29:00			Comet	CATCH
19	MPEC 2018-U37 2018 UA1	2018-10-20 21:57:00			PHAg18	CATCH
20	MPEC 2018-U53 2018 UQ1	2018-10-22 10:30:00			PHAg18	CATCH
21	MPEC 2018-V150 DAILY ORBIT UPDATE (2018 NOV. 11 UT)	2018-11-11 13:07:00
22	MPEC 2018-W52 DAILY ORBIT UPDATE (2018 NOV. 25 UT)	2018-11-25 13:05:00
23	MPEC 2019-A217 DAILY ORBIT UPDATE (2019 JAN. 13 UT)	2019-01-13 13:36:00
24	MPEC 2019-H29 COMET C/2019 F2 (ATLAS)	2019-04-22 01:49:00			Comet	CATCH
25	MPEC 2019-H41 2019 HD	2019-04-22 04:14:00			NEA (18>H>22)	CATCH
26	MPEC 2019-J117 2019 JU5	2019-05-12 18:45:00			NEA (H>22)	CATCH
27	MPEC 2019-J142 OBSERVATIONS AND ORBITS OF COMETS	2019-05-15 14:22:00			Comet	CATCH
28	MPEC 2019-N63 DAILY ORBIT UPDATE (2019 July 5)	2019-07-05 12:12:00
29	MPEC 2019-O75 DAILY ORBIT UPDATE (2019 July 27)	2019-07-27 20:04:00
30	MPEC 2019-O81 DAILY ORBIT UPDATE (2019 July 28)	2019-07-28 13:49:00
31	MPEC 2019-P37 2019 PA	2019-08-05 03:07:00			NEA (18>H>22)	CATCH
32	MPEC 2019-Q95 DAILY ORBIT UPDATE (2019 August 28)	2019-08-28 12:01:00
33	MPEC 2019-Q135 OBSERVATIONS AND ORBITS OF COMETS	2019-08-30 13:34:00			Comet	CATCH
34	MPEC 2019-S39 DAILY ORBIT UPDATE (2019 September 22)	2019-09-22 12:11:00
35	MPEC 2020-F83 DAILY ORBIT UPDATE (2020 March 23)	2020-03-23 12:06:00
36	MPEC 2020-L32 DAILY ORBIT UPDATE (2020 June 8)	2020-06-08 12:01:00
37	MPEC 2020-M29 2020 MK	2020-06-19 04:38:00			NEA (H>22)	CATCH
38	MPEC 2020-O30 COMET C/2020 M5 (ATLAS)	2020-07-19 21:40:00			Comet	CATCH
39	MPEC 2020-O103 DAILY ORBIT UPDATE (2020 July 25)	2020-07-25 12:23:00
40	MPEC 2020-Q45 DAILY ORBIT UPDATE (2020 August 17)	2020-08-17 12:06:00
41	MPEC 2020-Q98 DAILY ORBIT UPDATE (2020 August 19)	2020-08-19 12:10:00
42	MPEC 2020-Q146 DAILY ORBIT UPDATE (2020 August 21)	2020-08-21 12:11:00
43	MPEC 2020-S129 2020 SR2	2020-09-21 03:58:00	✓		NEA (H>22)	CATCH
44	MPEC 2020-S146 2020 SA3	2020-09-21 20:27:00	✓		NEA (H>22)	CATCH
45	MPEC 2020-S154 DAILY ORBIT UPDATE (2020 September 22)	2020-09-22 12:09:00
46	MPEC 2020-T01 DAILY ORBIT UPDATE (2020 October 1)	2020-10-01 12:19:00
47	MPEC 2020-T04 DAILY ORBIT UPDATE (2020 October 2)	2020-10-02 12:21:00
48	MPEC 2020-T05 DAILY ORBIT UPDATE (2020 October 3)	2020-10-03 12:19:00
49	MPEC 2020-T13 DAILY ORBIT UPDATE (2020 October 6)	2020-10-06 12:22:00
50	MPEC 2020-U96 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS	2020-10-19 00:30:00			Comet	CATCH
51	MPEC 2024-N153 DAILY ORBIT UPDATE (2024 July 15)	2024-07-15 12:01:00
52	MPEC 2024-O99 DAILY ORBIT UPDATE (2024 July 30)	2024-07-30 12:09:00
53	MPEC 2024-P76 DAILY ORBIT UPDATE (2024 August 6)	2024-08-06 12:06:00
54	MPEC 2024-Q02 2024 PE6	2024-08-16 01:47:00			NEA (18>H>22)	CATCH
55	MPEC 2024-Q70 2024 QD1	2024-08-29 13:38:00			NEA (18>H>22)	CATCH
56	MPEC 2025-M162 2025 MM90	2025-06-30 14:45:00			NEA (H>22)	CATCH
57	MPEC 2025-O88 DAILY ORBIT UPDATE (2025 July 26)	2025-07-26 12:17:00
58	MPEC 2025-O100 DAILY ORBIT UPDATE (2025 July 27)	2025-07-27 12:18:00
59	MPEC 2025-O132 DAILY ORBIT UPDATE (2025 July 29)	2025-07-29 12:23:00
60	MPEC 2025-O154 2025 OS7	2025-07-31 02:55:00			NEA (H>22)	CATCH
61	MPEC 2025-P53 2025 PE	2025-08-02 13:59:00			NEA (H>22)	CATCH
62	MPEC 2025-P56 2025 OS13	2025-08-02 16:19:00			NEA (H>22)	CATCH
63	MPEC 2025-P142 2025 PS1	2025-08-13 18:13:00			NEA (H>22)	CATCH
64	MPEC 2025-Q92 2025 QU2	2025-08-22 13:55:00			NEA (H>22)	CATCH
65	MPEC 2025-R80 DAILY ORBIT UPDATE (2025 September 13)	2025-09-13 12:04:00
66	MPEC 2025-S08 2025 RL3	2025-09-16 06:07:00			NEA (18>H>22)	CATCH
67	MPEC 2025-S39 2025 SA	2025-09-17 02:36:00		✓	NEA (H>22)	CATCH
68	MPEC 2025-S82 2025 ST	2025-09-18 10:55:00			PHAg18	CATCH
69	MPEC 2025-S134 2025 SM2	2025-09-20 13:30:00			NEA (H>22)	CATCH
70	MPEC 2025-S149 2025 SY2	2025-09-21 01:32:00		✓	NEA (H>22)	CATCH
71	MPEC 2025-S150 2025 SZ2	2025-09-21 01:39:00			NEA (H>22)	CATCH

Objects Observed by This Station (72 total)

Object	Observations	Discoveries	First Obs	Last Obs	Magnitude	MPECs
K20S03A	48	12	2020-09-20	2020-09-20	18.6	12
K20S02R	12	3	2020-09-20	2020-09-20	19.8	3
03122	4655	0	2017-10-27	2017-10-29	N/A	931
E4332	2968	0	2018-07-21	2018-08-04	19.0	212
23187	2896	0	2020-08-11	2020-08-16	18.2	362
D6900	1596	0	2020-08-14	2020-08-16	19.6	133
85989	1584	0	2018-07-08	2018-07-08	18.6	396
07977	1340	0	2020-06-22	2020-06-22	19.6	335
K18E04J	1065	0	2018-05-13	2018-06-03	21.1	71
K20P05C	880	0	2020-09-21	2020-09-21	N/A	88
K13C89K	845	0	2019-08-28	2019-08-28	21.6	65
G2173	844	0	2020-09-21	2020-09-21	20.1	211
N7805	800	0	2019-09-21	2019-09-22	18.2	200
K19G03D	735	0	2019-07-05	2019-07-28	17.6	105
K10ED5C	444	0	2020-06-07	2020-06-07	18.6	111
K24K03H	400	0	2024-07-14	2024-07-29	22.3	50
K01SH0C	348	0	2018-07-15	2018-07-15	N/A	58
K18L02Q	340	0	2018-09-02	2018-09-02	20.8	68
K19G03T	310	0	2019-09-22	2019-09-22	21.3	62
CK20M050	300	0	2020-07-19	2020-07-19	18.5	50
K20D04M	294	0	2020-03-22	2020-03-22	19.1	49
k8448	288	0	2016-08-06	2016-08-07	21.1	72
K18U01Q	287	0	2018-10-20	2018-10-20	N/A	41
K18N03U	270	0	2018-07-14	2018-07-14	17.4	45
K19P00A	260	0	2019-08-03	2019-08-03	21.9	52
q3815	238	0	2018-11-11	2018-11-11	16.8	34
CK19F020	224	0	2019-04-21	2019-04-21	17.2	14
K05R00B	204	0	2018-08-18	2018-08-18	18.7	51
CK17M040	185	0	2018-09-02	2018-09-02	16.6	37
K11A37A	175	0	2018-11-08	2018-11-08	19.0	25
K18S03A	175	0	2018-11-10	2018-11-10	N/A	25
K18U01A	168	0	2018-10-20	2018-10-20	N/A	21
S5990	168	0	2020-09-21	2020-09-21	20.9	42
CK17Y020	160	0	2020-06-26	2020-06-26	16.3	40
n6018	146	0	2017-07-23	2017-07-23	21.9	73
n7135	140	0	2020-08-19	2020-08-19	N/A	35
68347	138	0	2018-06-24	2018-06-24	N/A	46
n6005	132	0	2017-10-28	2017-10-28	21.9	66
K18R08P	116	0	2018-09-17	2018-09-17	19.8	29
K07C15H	108	0	2020-07-25	2020-07-25	18.6	27
K24P06E	100	0	2024-08-15	2024-08-15	20.2	25
K19H00D	95	0	2019-04-21	2019-04-21	18.9	19
K20O02J	88	0	2020-08-14	2020-08-14	18.8	22
K18F00B	80	0	2018-03-17	2018-03-17	18.5	16
K25P01J	75	0	2025-09-13	2025-09-13	20.2	25
K25P01S	60	0	2025-08-13	2025-08-13	22.5	12
K20M00K	56	0	2020-06-18	2020-06-18	21.3	14
K19J05U	55	0	2019-05-12	2019-05-12	22.4	11
n9490	54	0	2017-10-28	2017-10-28	19.8	27
K18E01P	48	0	2018-03-11	2018-03-11	N/A	16
K18N00H	48	0	2018-07-06	2018-07-06	19.5	8
K25O01J	39	0	2025-07-26	2025-07-26	19.6	13
K25O00W	33	0	2025-07-25	2025-07-25	19.8	11
K25R03L	33	0	2025-09-15	2025-09-15	N/A	11
K20M00Z	32	0	2020-06-22	2020-06-22	19.2	8
K24Q01D	30	0	2024-08-29	2024-08-29	23.2	10
K25N01W	30	0	2025-07-26	2025-07-26	21.7	10
K25S00T	30	0	2025-09-17	2025-09-17	18.1	10
K25S02Z	30	0	2025-09-20	2025-09-20	19.3	5
~00yn	30	0	2024-08-05	2024-08-05	19.8	6
K25Q02U	28	0	2025-08-21	2025-08-21	22.8	7
K25O02N	24	0	2025-07-29	2025-07-29	N/A	8
K25S02Y	24	0	2025-09-19	2025-09-20	22.5	8
CK19J030	21	0	2019-07-28	2019-07-28	18.5	7
K25P00E	21	0	2025-08-02	2025-08-02	19.0	7
K25O01N	18	0	2025-07-26	2025-07-26	22.0	6
K25O13S	18	0	2025-08-02	2025-08-02	20.2	6
K24O00O	12	0	2024-07-29	2024-07-29	18.9	3
K25S02M	12	0	2025-09-20	2025-09-20	19.8	4
K25M90M	9	0	2025-06-30	2025-06-30	20.4	3
K25O07S	4	0	2025-07-29	2025-07-29	21.0	1
K25S00A	4	0	2025-09-16	2025-09-16	21.3	1

List of Observers

Observer Group	Total MPECs
Unknown	41
B.Van Deventer	27
B.Vandeventer, C.Zhai, M.Shao, N.Saini, R.Morrison, R.Trahan	3

Individual Observer	Total MPECs
Unknown	41
B.Van Deventer	27
B.Vandeventer	3
C.Zhai	3
M.Shao	3
N.Saini	3
R.Morrison	3
R.Trahan	3

List of Measurers

Measurer Group	Total MPECs
Unknown	71

Individual Measurer	Total MPECs
Unknown	71

List of Facilities

Facilities	Count
0.25-m Schmidt-Cassegrain + CCD	2
0.28-m f/2.2 reflector + CCD	3
0.3-m Schmidt + CCD	1
0.4-m Schmidt-Cassegrain + CCD	5
0.4-m f/10 SCT + CCD	13
0.4-m f/10 Schmidt-Cassegrain + CCD	4
0.4m SCT + CCD	1
Unknown	42