O17 Purple Mountain Observatory, Lenghu-1

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
2024 1 0 0 0 0 0 0 0 1 0
2023 0 0 0 0 0 0 0 0 0 0
2022 8 0 0 1 7 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 2024-X68 2024 XA1 2024-12-03 18:15:00 NEA (H>22) CATCH
2 MPEC 2022-J105 DAILY ORBIT UPDATE (2022 May 13) 2022-05-13 12:21:00
3 MPEC 2022-J99 DAILY ORBIT UPDATE (2022 May 12) 2022-05-12 12:21:00
4 MPEC 2022-J89 DAILY ORBIT UPDATE (2022 May 11) 2022-05-11 12:09:00
5 MPEC 2022-J69 DAILY ORBIT UPDATE (2022 May 9) 2022-05-09 12:08:00
6 MPEC 2022-J44 DAILY ORBIT UPDATE (2022 May 6) 2022-05-06 12:08:00
7 MPEC 2022-J42 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS 2022-05-06 07:24:00 Comet CATCH
8 MPEC 2022-J31 DAILY ORBIT UPDATE (2022 May 4) 2022-05-04 12:06:00
9 MPEC 2022-J20 DAILY ORBIT UPDATE (2022 May 3) 2022-05-03 12:04:00

List of Observers

Observers Count
C. Zhang, B. Li, Y. D. Ping 3
Y. Z. Li, J. S. Wang, L. K. Guo, K. T. Yuan, B. Li, Y. D. Ping 2

List of Measurers

Measurers Count
B. Li, C. Zhang, H. B. Zhao 3
B. Li, H. B. Zhao 2

List of Facilities

Facilities Count
0.7m f/1.7 reflector + CMOS 5