O49 Purple Mountain Observatory, Yaoan Station

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 2 0 0 0 1 0 0 0 0 1
2023 13 0 0 1 8 0 0 0 3 1
2022 1 0 0 0 0 0 0 0 1 0
2021 2 0 0 0 1 0 0 0 1 0
2020 4 0 0 1 1 0 0 0 2 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-G154 DAILY ORBIT UPDATE (2024 April 11) 2024-04-11 12:17:00
2 MPEC 2024-E139 2024 EY2 2024-03-10 01:20:00 ✓ NEA (18>H>22) CATCH
3 MPEC 2023-W105 2023 WO2 2023-11-23 14:14:00 NEA (H>22) CATCH
4 MPEC 2023-K125 DAILY ORBIT UPDATE (2023 May 24) 2023-05-24 13:08:00
5 MPEC 2023-K115 DAILY ORBIT UPDATE (2023 May 23) 2023-05-23 13:07:00
6 MPEC 2023-H166 DAILY ORBIT UPDATE (2023 April 24) 2023-04-24 12:25:00
7 MPEC 2023-H109 DAILY ORBIT UPDATE (2023 April 20) 2023-04-20 12:18:00
8 MPEC 2023-F140 2023 FA4 2023-03-26 06:01:00 ✓ NEA (18>H>22) CATCH
9 MPEC 2023-F134 DAILY ORBIT UPDATE (2023 March 25) 2023-03-25 12:02:00
10 MPEC 2023-F123 2018 RW6 2023-03-24 12:49:00 NEA (18>H>22) CATCH
11 MPEC 2023-F116 DAILY ORBIT UPDATE (2023 March 23) 2023-03-23 12:46:00
12 MPEC 2023-F72 DAILY ORBIT UPDATE (2023 March 20) 2023-03-20 12:27:00
13 MPEC 2023-F08 2023 EJ2 2023-03-16 02:34:00 NEA (18>H>22) CATCH
14 MPEC 2023-E59 COMET C/2023 E1 (ATLAS) 2023-03-12 03:18:00 Comet CATCH
15 MPEC 2023-E34 DAILY ORBIT UPDATE (2023 March 3) 2023-03-03 12:36:00
16 MPEC 2022-A05 2022 AA 2022-01-02 21:12:00 PHAg18 CATCH
17 MPEC 2021-Y79 2021 YS 2021-12-31 18:59:00 NEA (18>H>22) CATCH
18 MPEC 2021-V274 DAILY ORBIT UPDATE (2021 November 12) 2021-11-12 12:29:00
19 MPEC 2020-Q141 2020 QK3 2020-08-21 02:36:00 Unusual CATCH
20 MPEC 2020-K117 OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS 2020-05-22 05:55:00 Comet CATCH
21 MPEC 2020-E28 DAILY ORBIT UPDATE (2020 March 7) 2020-03-07 12:05:00
22 MPEC 2020-D143 2020 DM4 2020-02-29 18:57:00 PHAg18 CATCH

List of Observers

Observers Count
F. Li, Y. Yuan, J. Chen, A. Zhu, Y. Fu 25
F. Li, Y. Yuan, J. Chen, A. Zhu, Y. N. Fu 18

List of Measurers

Measurers Count
B. Li, H. B. Zhao 43

List of Facilities

Facilities Count
0.8-m f/10 Ritchey-Chretien + 2048 CCD 2
0.8-m f/10 Ritchey- Chretien + 2048 CCD 23
0.8-m f/10 Ritchey- Chretien +2048 CCD 18