754 Yerkes Observatory, Williams Bay

Last update: UTC 2026-02-25 06:43:29

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 0 0 0 0 0 0 0 0 0 0
2025 0 0 0 0 0 0 0 0 0 0
2024 0 0 0 0 0 0 0 0 0 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 0 0 0 0 0 0 0 0 0 0
2019 0 0 0 0 0 0 0 0 0 0
2018 2 0 0 0 1 0 0 0 1 0
2017 2 0 0 0 2 0 0 0 0 0
2016 15 0 0 1 9 0 0 0 4 1
2015 30 0 0 2 4 0 0 0 23 1
2014 5 0 0 0 2 0 0 0 3 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 3 0 0 1 2 0 0 0 0 0
2005 3 0 0 0 3 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 2 0 0 2 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 1996-K04 1996 JA1 1996-05-18 14:03:00 PHAg18 CATCH
2 MPEC 1996-K06 1996 JA1 1996-05-19 14:44:00 PHAg18 CATCH
3 MPEC 2005-H02 DAILY ORBIT UPDATE (2005 APR. 16 UT) 2005-04-16 06:15:00
4 MPEC 2005-O37 DAILY ORBIT UPDATE (2005 JULY 29 UT) 2005-07-29 06:10:00
5 MPEC 2005-Q02 DAILY ORBIT UPDATE (2005 AUG. 17 UT) 2005-08-17 06:12:00
6 MPEC 2006-N22 DAILY ORBIT UPDATE (2006 JULY 12 UT) 2006-07-12 06:13:00
7 MPEC 2006-N23 DAILY ORBIT UPDATE (2006 JULY 13 UT) 2006-07-13 06:06:00
8 MPEC 2006-O18 OBSERVATIONS OF COMETS 2006-07-21 21:34:00 Comet CATCH
9 MPEC 2014-S123 DAILY ORBIT UPDATE (2014 SEPT. 30 UT) 2014-09-30 12:04:00
10 MPEC 2014-V29 DAILY ORBIT UPDATE (2014 NOV. 6 UT) 2014-11-06 12:06:00
11 MPEC 2014-W75 2014 WX120 2014-11-23 14:17:00 Unusual CATCH
12 MPEC 2014-W130 2014 WU362 2014-11-27 17:24:00 NEA (18>H>22) CATCH
13 MPEC 2014-Y20 COMET C/2014 Y1 (PANSTARRS) 2014-12-19 15:32:00 Comet CATCH
14 MPEC 2015-F121 2015 FA118 2015-03-27 01:46:00 NEA (18>H>22) CATCH
15 MPEC 2015-F135 DAILY ORBIT UPDATE (2015 MAR. 28 UT) 2015-03-28 12:13:00
16 MPEC 2015-F163 2015 FL290 2015-03-31 14:22:00 NEA (H>22) CATCH
17 MPEC 2015-G03 OBSERVATIONS AND ORBITS OF COMETS 2015-04-01 17:12:00 Comet CATCH
18 MPEC 2015-H16 DAILY ORBIT UPDATE (2015 APR. 18 UT) 2015-04-18 12:06:00
19 MPEC 2015-S66 2015 SZ 2015-09-21 16:03:00 NEA (H>22) CATCH
20 MPEC 2015-S74 2015 SV2 2015-09-23 14:08:00 NEA (18>H>22) CATCH
21 MPEC 2015-S101 2015 SA17 2015-09-28 14:10:00 NEA (18>H>22) CATCH
22 MPEC 2015-T08 2015 TA 2015-10-05 15:42:00 NEA (18>H>22) CATCH
23 MPEC 2015-T74 2015 TD144 2015-10-12 21:24:00 NEA (H>22) CATCH
24 MPEC 2015-T92 2015 TH145 2015-10-13 21:36:00 PHAg18 CATCH
25 MPEC 2015-U05 2015 TG238 2015-10-16 14:07:00 NEA (H>22) CATCH
26 MPEC 2015-U12 DAILY ORBIT UPDATE (2015 OCT. 17 UT) 2015-10-17 12:05:00
27 MPEC 2015-U21 2015 TG323 2015-10-18 16:42:00 ✓ NEA (18>H>22) CATCH
28 MPEC 2015-U58 2015 UM52 2015-10-25 16:48:00 NEA (H>22) CATCH
29 MPEC 2015-U60 2015 UT52 2015-10-26 20:36:00 NEA (18>H>22) CATCH
30 MPEC 2015-U68 2015 UC67 2015-10-31 14:07:00 NEA (18>H>22) CATCH
31 MPEC 2015-V27 2015 VB1 2015-11-04 19:27:00 NEA (H>22) CATCH
32 MPEC 2015-V43 COMET C/2015 V1 (PANSTARRS) 2015-11-05 11:47:00 Comet CATCH
33 MPEC 2015-V115 2015 VR65 2015-11-10 14:11:00 NEA (H>22) CATCH
34 MPEC 2015-W03 2015 VL142 2015-11-16 14:14:00 NEAl18 CATCH
35 MPEC 2015-W73 COMET P/2015 W2 (CATALINA) 2015-11-29 23:50:00 Comet CATCH
36 MPEC 2015-X145 2015 XL261 2015-12-11 20:29:00 NEA (H>22) CATCH
37 MPEC 2015-X146 2015 XN261 2015-12-11 22:18:00 NEA (H>22) CATCH
38 MPEC 2015-X150 DAILY ORBIT UPDATE (2015 DEC. 12 UT) 2015-12-12 13:03:00
39 MPEC 2015-X151 2015 XV261 2015-12-12 21:58:00 NEA (H>22) CATCH
40 MPEC 2015-Y40 2015 YB1 2015-12-19 14:19:00 NEA (18>H>22) CATCH
41 MPEC 2015-Y50 2015 YN1 2015-12-20 14:18:00 NEA (18>H>22) CATCH
42 MPEC 2015-Y60 2015 YU1 2015-12-20 20:12:00 NEA (H>22) CATCH
43 MPEC 2016-A26 2006 BC 2016-01-03 22:25:00 PHAg18 CATCH
44 MPEC 2016-A30 2016 AJ2 2016-01-04 14:10:00 NEA (18>H>22) CATCH
45 MPEC 2016-A53 2015 YY18 2016-01-06 14:58:00 ✓ Unusual CATCH
46 MPEC 2016-B48 DAILY ORBIT UPDATE (2016 JAN. 21 UT) 2016-01-21 13:04:00
47 MPEC 2016-C40 DAILY ORBIT UPDATE (2016 FEB. 5 UT) 2016-02-05 13:04:00
48 MPEC 2016-D46 2016 CO264 2016-02-26 22:38:00 Unusual CATCH
49 MPEC 2016-D54 DAILY ORBIT UPDATE (2016 FEB. 28 UT) 2016-02-28 13:03:00
50 MPEC 2016-E80 DAILY ORBIT UPDATE (2016 MAR. 8 UT) 2016-03-08 13:06:00
51 MPEC 2016-E160 DAILY ORBIT UPDATE (2016 MAR. 14 UT) 2016-03-14 13:05:00
52 MPEC 2016-F36 DAILY ORBIT UPDATE (2016 MAR. 19 UT) 2016-03-19 12:05:00
53 MPEC 2016-F49 DAILY ORBIT UPDATE (2016 MAR. 24 UT) 2016-03-24 12:02:00
54 MPEC 2016-L64 2016 LA9 2016-06-07 15:25:00 NEA (18>H>22) CATCH
55 MPEC 2016-V114 DAILY ORBIT UPDATE (2016 NOV. 12 UT) 2016-11-12 13:05:00
56 MPEC 2016-V117 DAILY ORBIT UPDATE (2016 NOV. 13 UT) 2016-11-13 13:13:00
57 MPEC 2017-E16 DAILY ORBIT UPDATE (2017 MAR. 2 UT) 2017-03-02 13:18:00
58 MPEC 2017-U14 DAILY ORBIT UPDATE (2017 OCT. 16 UT) 2017-10-16 12:05:00
59 MPEC 2018-R163 2018 RB6 2018-09-14 19:55:00 NEA (H>22) CATCH
60 MPEC 2018-S52 DAILY ORBIT UPDATE (2018 SEPT. 22 UT) 2018-09-22 12:21:00

Objects Observed by This Station

Object Observations Discoveries First Obs Last Obs Magnitude MPECs
K04X14P 8364 0 2006-07-03 2006-07-08 19.0 102
30825 3414 0 2005-03-15 2005-03-16 21.1 569
X7866 1836 0 2016-01-29 2016-03-12 22.0 108
K05C69V 1541 0 2005-07-16 2005-07-20 20.2 67
00719 1256 0 2014-10-26 2014-11-05 21.1 314
K15S02V 637 0 2015-09-23 2015-09-23 22.3 91
K15O35L 620 0 2016-02-01 2016-03-11 21.7 124
36017 475 0 2014-09-22 2014-09-24 20.9 95
K05N44W 470 0 2005-07-17 2005-07-20 17.2 47
K06U00M 462 0 2016-11-12 2016-11-12 19.9 154
P0706 406 0 2016-02-01 2016-02-01 22.4 58
K15VE2L 366 0 2015-11-13 2015-11-13 18.5 122
K05J81T 315 0 2005-07-17 2005-07-19 20.8 35
K06B00C 301 0 2016-01-03 2016-01-03 18.7 43
K16L10Z 297 0 2016-09-27 2016-09-27 22.6 99
K05T00F 270 0 2016-11-11 2016-11-11 18.1 90
K15Xb9B 267 0 2016-02-10 2016-02-10 22.5 89
K06M06T 261 0 2006-07-08 2006-07-08 21.7 29
K15U67C 261 0 2015-10-26 2015-10-26 22.1 87
K15XC8R 240 0 2016-02-01 2016-02-01 19.4 80
K17B30L 228 0 2017-02-13 2017-02-14 21.7 38
K16P01N 222 0 2016-09-27 2016-10-04 19.7 37
K16AG5O 216 0 2016-02-07 2016-02-11 N/A 36
Z7022 216 0 2016-02-01 2016-02-01 21.0 36
K16U80U 215 0 2017-02-22 2017-02-22 18.1 43
0073P c 195 0 2006-05-17 2006-05-17 15.0 65
K16P66Z 189 0 2016-10-03 2016-10-03 22.1 63
CK14Y010 187 0 2014-12-18 2015-03-12 17.6 17
K16Q00D 183 0 2016-09-27 2016-09-27 18.4 61
J96J01A 180 0 1996-05-18 1996-05-19 10.9 5
K04Q01F 180 0 2005-07-17 2005-07-17 20.5 60
K17Q34V 180 0 2017-09-13 2017-09-14 N/A 30
K16N15H 174 0 2016-09-28 2016-09-28 21.9 58
K17BC3M 168 0 2017-02-23 2017-02-23 19.5 56
K15U52T 165 0 2015-10-26 2015-10-26 21.8 55
K16A08Z 165 0 2016-02-08 2016-02-08 21.4 55
K16L10U 156 0 2016-09-29 2016-09-29 21.0 52
K15TE5H 150 0 2015-10-11 2015-10-11 N/A 50
K00K44O 140 0 2005-07-16 2005-07-16 18.0 35
K16X23Q 140 0 2017-02-01 2017-02-02 18.8 35
K05O01U 136 0 2005-08-16 2005-08-16 N/A 34
K16N33F 135 0 2016-09-27 2016-09-27 21.1 45
K16P66X 132 0 2016-10-04 2016-10-04 21.5 66
K16B01E 120 0 2016-02-08 2016-03-06 N/A 20
K18R06B 120 0 2018-09-13 2018-09-14 18.2 5
K06M12D 117 0 2006-07-07 2006-07-07 20.4 39
K17B29D 117 0 2017-02-03 2017-02-03 20.8 39
K17P26J 117 0 2017-09-13 2017-09-13 21.6 39
K16N23G 114 0 2016-09-28 2016-09-28 22.1 38
K17P25T 114 0 2017-08-24 2017-08-24 N/A 38
0073P b 111 0 2006-05-17 2006-05-17 13.1 37
K16L47Y 110 0 2016-09-27 2016-09-27 19.5 55
K16B00T 108 0 2016-01-30 2016-02-06 N/A 18
K16N15Y 108 0 2016-09-28 2016-09-29 18.9 36
K04B68F 102 0 2006-07-07 2006-07-07 17.6 34
K17B31U 102 0 2017-02-22 2017-02-23 19.4 34
K05J00B 99 0 2005-07-15 2005-07-16 22.1 33
K06H57Y 90 0 2006-05-17 2006-05-17 22.4 9
K16A08H 87 0 2016-02-01 2016-02-01 21.4 29
CK15V010 84 0 2015-11-03 2015-11-03 15.6 28
K17A05F 84 0 2017-02-14 2017-02-14 21.6 28
K17L00U 81 0 2017-09-15 2017-09-15 N/A 27
K17Q35L 81 0 2017-09-14 2017-09-14 19.1 27
K15V01B 80 0 2015-11-02 2015-11-02 22.1 20
K15FT0L 78 0 2015-03-29 2015-03-29 19.9 26
K15T00A 78 0 2015-10-02 2015-10-02 21.9 26
PK15W020 78 0 2015-11-21 2015-11-29 19.2 6
K16M00B 76 0 2016-09-26 2016-09-26 22.1 38
K16L09A 75 0 2016-06-07 2016-06-07 22.7 25
K17R01K 75 0 2017-09-15 2017-09-15 25.8 25
K02E12X 74 0 2005-07-15 2005-07-15 15.4 37
K15Y01N 72 0 2015-12-20 2015-12-20 21.9 24
K15FB8A 69 0 2015-03-24 2015-03-24 N/A 23
K15TE4D 66 0 2015-10-11 2015-10-16 19.4 11
K16A02J 66 0 2016-01-03 2016-01-03 N/A 22
K17H03N 66 0 2017-09-13 2017-09-13 N/A 33
K17K34R 66 0 2017-09-12 2017-09-12 21.8 33
K17P27A 64 0 2017-08-23 2017-09-13 21.4 16
K15S17A 63 0 2015-09-26 2015-09-27 21.2 21
K16Y10U 63 0 2017-02-04 2017-02-04 22.3 21
K17P00F 60 0 2017-09-13 2017-09-15 22.0 12
K17C01P 57 0 2017-02-13 2017-02-13 19.9 19
K15Y01U 54 0 2015-12-20 2015-12-20 20.3 18
K17D15R 54 0 2017-02-23 2017-02-23 19.5 18
K15S00Z 51 0 2015-09-20 2015-09-20 18.0 17
K17B93Y 51 0 2017-02-14 2017-02-14 N/A 17
K17B03K 50 0 2017-02-04 2017-02-12 N/A 10
K15G01A 48 0 2015-04-13 2015-04-14 20.9 6
K15XQ1L 48 0 2015-12-10 2015-12-11 20.4 8
K16Y11F 48 0 2017-02-04 2017-02-04 21.8 16
K17O20D 48 0 2017-08-24 2017-08-24 20.5 16
K17O68G 48 0 2017-08-24 2017-08-24 22.8 16
K16V05Q 46 0 2016-11-27 2016-11-27 N/A 23
K17B03L 46 0 2017-02-12 2017-02-12 22.6 23
K15Y01B 45 0 2015-12-19 2015-12-19 21.7 15
K15XQ1N 42 0 2015-12-11 2015-12-11 14.7 14
K16U41D 42 0 2016-11-04 2016-11-04 17.6 14
K17A05G 42 0 2017-02-02 2017-02-15 24.0 7
K17F90H 42 0 2017-09-13 2017-09-13 22.4 21
K16Y01M 40 0 2017-02-22 2017-02-22 20.5 20
K16X00M 38 0 2017-02-04 2017-02-04 N/A 19
K17Q34Y 36 0 2017-09-13 2017-09-13 22.4 18
K16U56Y 34 0 2016-11-11 2016-11-11 20.3 17
K17B05S 34 0 2017-02-15 2017-02-15 23.8 17
K17R00U 34 0 2017-09-14 2017-09-14 19.6 17
K14Wa2U 32 0 2014-11-25 2014-11-25 21.9 8
K15Y07X 30 0 2016-02-01 2016-02-01 N/A 15
K16R33Y 28 0 2016-11-05 2016-11-05 19.2 14
K15TN8G 27 0 2015-10-15 2015-10-15 N/A 9
K15V65R 27 0 2015-11-09 2015-11-09 N/A 9
K17A13Z 26 0 2017-02-03 2017-02-03 21.3 13
K16W48R 24 0 2017-02-02 2017-02-02 21.3 8
K16V03H 22 0 2016-11-12 2016-11-12 N/A 11
K15TW3G 21 0 2015-10-15 2015-10-15 22.3 7
K16Q11N 20 0 2017-02-13 2017-02-13 19.1 10
K16U41M 20 0 2016-11-03 2016-11-03 21.6 10
K17Q03G 20 0 2017-09-13 2017-09-13 20.5 10
K15XQ1V 16 0 2015-12-11 2015-12-11 21.5 4
K17B06U 16 0 2017-02-03 2017-02-03 21.0 8
K16D01E 12 0 2016-02-27 2016-02-27 20.1 4
K16E27M 12 0 2016-03-12 2016-03-12 N/A 6
K15U52M 9 0 2015-10-25 2015-10-25 22.9 3
K15E00V 8 0 2015-03-13 2015-03-13 N/A 4
K14WC0X 5 0 2014-11-20 2014-11-20 21.0 1
K15Y18Y 4 0 2016-01-04 2016-01-04 19.8 1
K16CQ4O 3 0 2016-02-17 2016-02-17 21.5 1

List of Observers

Observer Group Total MPECs
V.L.Hoette 28
Unknown 23
A.W.Puckett, V.Hoette 2
J.W.Briggs 2
A.W.Puckett 1
D.E.Reichart, J.B.Haislip, K.M.Ivarsen 1
D.E.Reichart, J.B.Haislip, K.M.Ivarsen, V.Hoette 1
A.W.Puckett, S.A.Heatherly, V.L.Hoette 1
T.A.Rector, V.L.Hoette 1
Individual Observer Total MPECs
V.L.Hoette 30
Unknown 23
A.W.Puckett 4
V.Hoette 3
D.E.Reichart 2
J.B.Haislip 2
K.M.Ivarsen 2
J.W.Briggs 2
S.A.Heatherly 1
T.A.Rector 1

List of Measurers

Measurer Group Total MPECs
Unknown 25
A.W.Puckett, T.R.Linder, V.L.Hoette 15
A.W.Puckett, R.L.Sanchez, T.R.Linder, V.L.Hoette 9
A.W.Puckett, V.Hoette 2
A.L.Caughey, A.W.Puckett, J.E.Brown 1
A.W.Puckett, C.Meskauskas, E.Cheng, L.Schaad 1
A.W.Puckett, P.E.Halford, V.L.Hoette 1
A.L.Caughey, A.W.Puckett, J.E.Brown, T.R.Linder, V.L.Hoette 1
A.W.Puckett, J.D.Kenney, R.L.Sanchez, V.L.Hoette, W.A.Wuerker 1
A.L.Caughey, A.W.Puckett, R.L.Sanchez, T.R.Linder, V.L.Hoette 1
A.W.Puckett, R.L.Sanchez, V.L.Hoette 1
A.E.Burrows, A.W.Puckett, B.L.Mespelt, R.L.Sanchez, V.L.Hoette 1
D.Li, G.Holt, L.Feldman, N.Litza, T.GurrEithun, V.L.Hoette 1
Individual Measurer Total MPECs
A.W.Puckett 34
V.L.Hoette 31
T.R.Linder 26
Unknown 25
R.L.Sanchez 13
A.L.Caughey 3
J.E.Brown 2
V.Hoette 2
C.Meskauskas 1
E.Cheng 1
L.Schaad 1
P.E.Halford 1
J.D.Kenney 1
W.A.Wuerker 1
A.E.Burrows 1
B.L.Mespelt 1
D.Li 1
G.Holt 1
L.Feldman 1
N.Litza 1
T.GurrEithun 1

List of Facilities

Facilities Count
0.15-m refractor 2
0.61-m f/13.2 Cassegrain reflector + CCD 1
1.02-m f/8.04 Cassegrain reflector + CCD 34
Unknown 23