Welcome to MPEC Watch!

Note: This site is still under active development. Some links do not work.

MPEC Watch provides various statistical metrics and plots derived from Minor Planet Center's Minor Planet Electronic Circular service. This website is created and maintained by Quanzhi Ye. Tables and plots are automatically updated at midnight US Eastern Time.

Last update: UTC 2022-05-26 04:02:19

Year Total MPECs Editorial Discovery P/R/FU DOU List Update Retraction Other
1. P/R/FU - precovery/recovery/follow-up.
2. DOU - Daily Orbit Update.
2022 1623 0 1250 227 146 0 0 0
2021 4477 3 3339 761 366 0 0 8
2020 4019 0 3160 474 367 0 0 18
2019 3728 0 2582 777 360 0 1 8
2018 2790 0 1967 453 362 0 3 5
2017 3000 0 2197 438 362 0 0 3
2016 3198 0 2286 547 363 0 1 1
2015 2486 1 1660 457 364 0 4 0
2014 2170 1 1447 360 361 0 1 0
2013 1797 1 1089 352 354 0 0 1
2012 1729 1 1043 319 361 0 3 2
2011 1629 1 919 297 361 51 0 0
2010 2027 1 967 631 361 65 1 1
2009 1899 1 829 629 365 72 0 3
2008 1883 1 858 590 366 66 0 2
2007 1747 1 669 628 362 87 0 0
2006 1698 2 713 554 357 70 0 2
2005 1708 0 686 594 358 70 0 0
2004 1659 1 581 634 361 81 0 1
2003 1618 1 512 682 358 65 0 0
2002 1616 6 549 629 348 84 0 0
2001 1303 3 515 368 331 84 0 2
2000 1134 0 418 354 290 70 0 2
1999 898 2 323 176 324 73 0 0
1998 742 1 270 85 339 46 0 1
1997 301 1 91 145 16 48 0 0
1996 207 0 61 94 0 52 0 0
1995 178 2 66 69 0 41 0 0
1994 180 0 65 97 0 16 0 2
1993 56 2 20 30 0 1 0 3

Last 1 year (2021-05-26 to 2022-05-26)

# Observatory Total MPECs
1 G96 Mt. Lemmon Survey 1803
2 I52 Steward Observatory, Mt. Lemmon Station 1802
3 F51 Pan-STARRS 1, Haleakala 1638
4 F52 Pan-STARRS 2, Haleakala 1425
5 H21 Astronomical Research Observatory, Westfield 1231
6 L01 Visnjan Observatory, Tican 1171
7 033 Karl Schwarzschild Observatory, Tautenburg 967
8 807 Cerro Tololo Observatory, La Serena 966
9 J95 Great Shefford 586
10 703 Catalina Sky Survey 577

Last 5 years (2017-05-27 to 2022-05-26)

# Observatory Total MPECs
1 I52 Steward Observatory, Mt. Lemmon Station 8970
2 F51 Pan-STARRS 1, Haleakala 8350
3 G96 Mt. Lemmon Survey 8084
4 L01 Visnjan Observatory, Tican 5286
5 H21 Astronomical Research Observatory, Westfield 5220
6 F52 Pan-STARRS 2, Haleakala 3918
7 807 Cerro Tololo Observatory, La Serena 3214
8 033 Karl Schwarzschild Observatory, Tautenburg 3091
9 J95 Great Shefford 2905
10 703 Catalina Sky Survey 2490

All time (since 1993-09-19)

# Observatory Total MPECs
1 G96 Mt. Lemmon Survey 16907
2 F51 Pan-STARRS 1, Haleakala 14749
3 H21 Astronomical Research Observatory, Westfield 10688
4 I52 Steward Observatory, Mt. Lemmon Station 10369
5 291 LPL/Spacewatch II 9932
6 703 Catalina Sky Survey 8837
7 J95 Great Shefford 8280
8 568 Mauna Kea 7399
9 704 Lincoln Laboratory ETS, New Mexico 7015
10 807 Cerro Tololo Observatory, La Serena 6519

Last 1 year (2021-05-26 to 2022-05-26)

# Observatory Total MPECs
1 G96 Mt. Lemmon Survey 1125
2 F52 Pan-STARRS 2, Haleakala 668
3 F51 Pan-STARRS 1, Haleakala 660
4 V00 Kitt Peak-Bok 174
5 703 Catalina Sky Survey 144
6 T08 ATLAS-MLO, Mauna Loa 92
7 W94 MAP, San Pedro de Atacama 72
8 T05 ATLAS-HKO, Haleakala 67
9 K88 GINOP-KHK, Piszkesteto 51
10 W84 Cerro Tololo-DECam 49

Last 5 years (2017-05-27 to 2022-05-26)

# Observatory Total MPECs
1 G96 Mt. Lemmon Survey 5498
2 F51 Pan-STARRS 1, Haleakala 4044
3 F52 Pan-STARRS 2, Haleakala 1270
4 703 Catalina Sky Survey 815
5 T08 ATLAS-MLO, Mauna Loa 458
6 T05 ATLAS-HKO, Haleakala 325
7 568 Mauna Kea 297
8 V00 Kitt Peak-Bok 250
9 I41 Palomar Mountain--ZTF 249
10 C51 WISE 114

All time (since 1993-09-19)

# Observatory Total MPECs
1 G96 Mt. Lemmon Survey 10006
2 F51 Pan-STARRS 1, Haleakala 7784
3 703 Catalina Sky Survey 3399
4 704 Lincoln Laboratory ETS, New Mexico 2641
5 F52 Pan-STARRS 2, Haleakala 1276
6 691 Steward Observatory, Kitt Peak-Spacewatch 891
7 568 Mauna Kea 657
8 E12 Siding Spring Survey 506
9 T08 ATLAS-MLO, Mauna Loa 458
10 C51 WISE 396

Last 1 year (2021-05-26 to 2022-05-26)

# Observatory Total MPECs
1 I52 Steward Observatory, Mt. Lemmon Station 1456
2 L01 Visnjan Observatory, Tican 1085
3 H21 Astronomical Research Observatory, Westfield 1049
4 033 Karl Schwarzschild Observatory, Tautenburg 826
5 807 Cerro Tololo Observatory, La Serena 680
6 I93 St Pardon de Conques 510
7 J95 Great Shefford 447
8 F51 Pan-STARRS 1, Haleakala 379
9 204 Schiaparelli Observatory 372
10 568 Mauna Kea 357

Last 5 years (2017-05-27 to 2022-05-26)

# Observatory Total MPECs
1 I52 Steward Observatory, Mt. Lemmon Station 7422
2 L01 Visnjan Observatory, Tican 4846
3 H21 Astronomical Research Observatory, Westfield 4002
4 033 Karl Schwarzschild Observatory, Tautenburg 2650
5 J95 Great Shefford 2198
6 807 Cerro Tololo Observatory, La Serena 2163
7 H01 Magdalena Ridge Observatory, Socorro 2047
8 568 Mauna Kea 1754
9 F51 Pan-STARRS 1, Haleakala 1640
10 I93 St Pardon de Conques 1514

All time (since 1993-09-19)

# Observatory Total MPECs
1 I52 Steward Observatory, Mt. Lemmon Station 8545
2 H21 Astronomical Research Observatory, Westfield 7128
3 291 LPL/Spacewatch II 5371
4 J95 Great Shefford 5291
5 H01 Magdalena Ridge Observatory, Socorro 4988
6 L01 Visnjan Observatory, Tican 4846
7 807 Cerro Tololo Observatory, La Serena 3678
8 568 Mauna Kea 3291
9 926 Tenagra II Observatory, Nogales 3254
10 H36 Sandlot Observatory, Scranton 3095

Last 1 year (2021-05-26 to 2022-05-26)

# Observatory Total MPECs
1 I52 Steward Observatory, Mt. Lemmon Station 879
2 L01 Visnjan Observatory, Tican 233
3 807 Cerro Tololo Observatory, La Serena 205
4 F51 Pan-STARRS 1, Haleakala 195
5 033 Karl Schwarzschild Observatory, Tautenburg 177
6 V06 Catalina Sky Survey-Kuiper 154
7 H21 Astronomical Research Observatory, Westfield 148
8 568 Mauna Kea 130
9 291 LPL/Spacewatch II 97
10 F52 Pan-STARRS 2, Haleakala 75

Last 5 years (2017-05-27 to 2022-05-26)

# Observatory Total MPECs
1 I52 Steward Observatory, Mt. Lemmon Station 4000
2 H01 Magdalena Ridge Observatory, Socorro 1010
3 L01 Visnjan Observatory, Tican 877
4 568 Mauna Kea 768
5 807 Cerro Tololo Observatory, La Serena 755
6 H21 Astronomical Research Observatory, Westfield 625
7 V06 Catalina Sky Survey-Kuiper 608
8 033 Karl Schwarzschild Observatory, Tautenburg 538
9 F51 Pan-STARRS 1, Haleakala 339
10 291 LPL/Spacewatch II 333

All time (since 1993-09-19)

# Observatory Total MPECs
1 I52 Steward Observatory, Mt. Lemmon Station 4430
2 H01 Magdalena Ridge Observatory, Socorro 2456
3 291 LPL/Spacewatch II 2216
4 568 Mauna Kea 1536
5 H21 Astronomical Research Observatory, Westfield 1529
6 J95 Great Shefford 1268
7 807 Cerro Tololo Observatory, La Serena 1258
8 L01 Visnjan Observatory, Tican 877
9 G96 Mt. Lemmon Survey 665
10 033 Karl Schwarzschild Observatory, Tautenburg 661

Last 1 year (2021-05-26 to 2022-05-26)

# Observatory Total MPECs
1 F52 Pan-STARRS 2, Haleakala 151
2 F51 Pan-STARRS 1, Haleakala 129
3 G96 Mt. Lemmon Survey 118
4 703 Catalina Sky Survey 72
5 K88 GINOP-KHK, Piszkesteto 8
6 I41 Palomar Mountain--ZTF 7
7 V00 Kitt Peak-Bok 5
8 807 Cerro Tololo Observatory, La Serena 4
9 T08 ATLAS-MLO, Mauna Loa 4
10 U68 JPL SynTrack Robotic Telescope, Auberry 3

Last 5 years (2017-05-27 to 2022-05-26)

# Observatory Total MPECs
1 F51 Pan-STARRS 1, Haleakala 938
2 F52 Pan-STARRS 2, Haleakala 716
3 G96 Mt. Lemmon Survey 339
4 703 Catalina Sky Survey 165
5 I41 Palomar Mountain--ZTF 35
6 K88 GINOP-KHK, Piszkesteto 19
7 T08 ATLAS-MLO, Mauna Loa 12
8 T05 ATLAS-HKO, Haleakala 10
9 568 Mauna Kea 8
10 W84 Cerro Tololo-DECam 8

All time (since 1993-09-19)

# Observatory Total MPECs
1 F51 Pan-STARRS 1, Haleakala 1110
2 F52 Pan-STARRS 2, Haleakala 721
3 G96 Mt. Lemmon Survey 393
4 703 Catalina Sky Survey 210
5 704 Lincoln Laboratory ETS, New Mexico 75
6 691 Steward Observatory, Kitt Peak-Spacewatch 47
7 I41 Palomar Mountain--ZTF 37
8 699 Lowell Observatory-LONEOS 28
9 644 Palomar Mountain/NEAT 22
10 K88 GINOP-KHK, Piszkesteto 19