I41 Palomar Mountain--ZTF

• Country: United States
• State: California
• County: San Diego County
• City:
• Observatory Type: optical
• Old Names: None
• Website: http://ptf.caltech.edu
• Where is this observatory?

Last update: UTC 2026-02-24 07:45:29

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	122	0	3	2	12	0	0	0	92	13
2025	707	0	73	31	103	0	0	0	447	53
2024	130	0	37	13	56	0	0	0	20	4
2023	99	0	20	5	48	0	0	0	22	4
2022	194	0	9	27	134	0	0	0	22	2
2021	315	0	43	22	218	0	0	0	28	4
2020	300	0	38	11	229	0	0	0	18	4
2019	291	0	83	14	172	0	0	0	19	3
2018	212	0	50	12	128	0	0	0	19	3
2017	0	0	0	0	0	0	0	0	0	0
2016	15	0	0	5	10	0	0	0	0	0
2015	33	0	1	9	23	0	0	0	0	0
2014	79	0	14	14	51	0	0	0	0	0
2013	154	0	8	27	112	0	0	0	5	2
2012	0	0	0	0	0	0	0	0	0	0
2011	1	0	0	0	1	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