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 2022-08-17 04:02:15

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 2271 0 1682 359 229 0 0 1
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 (2021-08-17 to 2022-08-17)

# Observatory Total MPECs
1 I52 Steward Observatory, Mt. Lemmon Station 1832
2 G96 Mt. Lemmon Survey 1821
3 F52 Pan-STARRS 2, Haleakala 1796
4 F51 Pan-STARRS 1, Haleakala 1257
5 H21 Astronomical Research Observatory, Westfield 1227
6 L01 Visnjan Observatory, Tican 1083
7 807 Cerro Tololo Observatory, La Serena 998
8 033 Karl Schwarzschild Observatory, Tautenburg 959
9 I93 St Pardon de Conques 603
10 703 Catalina Sky Survey 599

Last 5 years (2017-08-18 to 2022-08-17)

# Observatory Total MPECs
1 I52 Steward Observatory, Mt. Lemmon Station 9018
2 F51 Pan-STARRS 1, Haleakala 8209
3 G96 Mt. Lemmon Survey 8146
4 L01 Visnjan Observatory, Tican 5387
5 H21 Astronomical Research Observatory, Westfield 5235
6 F52 Pan-STARRS 2, Haleakala 4316
7 807 Cerro Tololo Observatory, La Serena 3297
8 033 Karl Schwarzschild Observatory, Tautenburg 3148
9 J95 Great Shefford 2911
10 568 Mauna Kea 2554

All time (since 1993-09-19)

# Observatory Total MPECs
1 G96 Mt. Lemmon Survey 17077
2 F51 Pan-STARRS 1, Haleakala 14850
3 H21 Astronomical Research Observatory, Westfield 10891
4 I52 Steward Observatory, Mt. Lemmon Station 10544
5 291 LPL/Spacewatch II 9947
6 703 Catalina Sky Survey 8906
7 J95 Great Shefford 8361
8 568 Mauna Kea 7613
9 704 Lincoln Laboratory ETS, New Mexico 7015
10 807 Cerro Tololo Observatory, La Serena 6671

Last 1 year (2021-08-17 to 2022-08-17)

# Observatory Total MPECs
1 G96 Mt. Lemmon Survey 1125
2 F52 Pan-STARRS 2, Haleakala 912
3 F51 Pan-STARRS 1, Haleakala 378
4 V00 Kitt Peak-Bok 167
5 703 Catalina Sky Survey 149
6 T08 ATLAS-MLO, Mauna Loa 71
7 W94 MAP, San Pedro de Atacama 68
8 K88 GINOP-KHK, Piszkesteto 55
9 T05 ATLAS-HKO, Haleakala 51
10 W84 Cerro Tololo-DECam 47

Last 5 years (2017-08-18 to 2022-08-17)

# Observatory Total MPECs
1 G96 Mt. Lemmon Survey 5504
2 F51 Pan-STARRS 1, Haleakala 3925
3 F52 Pan-STARRS 2, Haleakala 1514
4 703 Catalina Sky Survey 816
5 T08 ATLAS-MLO, Mauna Loa 445
6 T05 ATLAS-HKO, Haleakala 322
7 568 Mauna Kea 285
8 I41 Palomar Mountain--ZTF 255
9 V00 Kitt Peak-Bok 251
10 C51 WISE 112

All time (since 1993-09-19)

# Observatory Total MPECs
1 G96 Mt. Lemmon Survey 10075
2 F51 Pan-STARRS 1, Haleakala 7794
3 703 Catalina Sky Survey 3407
4 704 Lincoln Laboratory ETS, New Mexico 2641
5 F52 Pan-STARRS 2, Haleakala 1520
6 691 Steward Observatory, Kitt Peak-Spacewatch 893
7 568 Mauna Kea 666
8 E12 Siding Spring Survey 506
9 T08 ATLAS-MLO, Mauna Loa 468
10 C51 WISE 401

Last 1 year (2021-08-17 to 2022-08-17)

# Observatory Total MPECs
1 I52 Steward Observatory, Mt. Lemmon Station 1486
2 H21 Astronomical Research Observatory, Westfield 1037
3 L01 Visnjan Observatory, Tican 1004
4 033 Karl Schwarzschild Observatory, Tautenburg 824
5 807 Cerro Tololo Observatory, La Serena 707
6 I93 St Pardon de Conques 572
7 J95 Great Shefford 439
8 958 Observatoire de Dax 418
9 204 Schiaparelli Observatory 387
10 568 Mauna Kea 383

Last 5 years (2017-08-18 to 2022-08-17)

# Observatory Total MPECs
1 I52 Steward Observatory, Mt. Lemmon Station 7452
2 L01 Visnjan Observatory, Tican 4937
3 H21 Astronomical Research Observatory, Westfield 4044
4 033 Karl Schwarzschild Observatory, Tautenburg 2691
5 807 Cerro Tololo Observatory, La Serena 2226
6 J95 Great Shefford 2191
7 H01 Magdalena Ridge Observatory, Socorro 2022
8 568 Mauna Kea 1854
9 F51 Pan-STARRS 1, Haleakala 1618
10 I93 St Pardon de Conques 1578

All time (since 1993-09-19)

# Observatory Total MPECs
1 I52 Steward Observatory, Mt. Lemmon Station 8672
2 H21 Astronomical Research Observatory, Westfield 7277
3 291 LPL/Spacewatch II 5378
4 J95 Great Shefford 5335
5 H01 Magdalena Ridge Observatory, Socorro 4988
6 L01 Visnjan Observatory, Tican 4940
7 807 Cerro Tololo Observatory, La Serena 3786
8 568 Mauna Kea 3455
9 926 Tenagra II Observatory, Nogales 3254
10 033 Karl Schwarzschild Observatory, Tautenburg 3150

Last 1 year (2021-08-17 to 2022-08-17)

# Observatory Total MPECs
1 I52 Steward Observatory, Mt. Lemmon Station 895
2 807 Cerro Tololo Observatory, La Serena 202
3 L01 Visnjan Observatory, Tican 196
4 F51 Pan-STARRS 1, Haleakala 189
5 033 Karl Schwarzschild Observatory, Tautenburg 173
6 V06 Catalina Sky Survey-Kuiper 147
7 568 Mauna Kea 145
8 H21 Astronomical Research Observatory, Westfield 137
9 291 LPL/Spacewatch II 88
10 F52 Pan-STARRS 2, Haleakala 79

Last 5 years (2017-08-18 to 2022-08-17)

# Observatory Total MPECs
1 I52 Steward Observatory, Mt. Lemmon Station 4022
2 H01 Magdalena Ridge Observatory, Socorro 1005
3 L01 Visnjan Observatory, Tican 894
4 568 Mauna Kea 828
5 807 Cerro Tololo Observatory, La Serena 779
6 H21 Astronomical Research Observatory, Westfield 623
7 V06 Catalina Sky Survey-Kuiper 613
8 033 Karl Schwarzschild Observatory, Tautenburg 544
9 F51 Pan-STARRS 1, Haleakala 335
10 291 LPL/Spacewatch II 329

All time (since 1993-09-19)

# Observatory Total MPECs
1 I52 Steward Observatory, Mt. Lemmon Station 4498
2 H01 Magdalena Ridge Observatory, Socorro 2456
3 291 LPL/Spacewatch II 2218
4 568 Mauna Kea 1620
5 H21 Astronomical Research Observatory, Westfield 1556
6 807 Cerro Tololo Observatory, La Serena 1291
7 J95 Great Shefford 1275
8 L01 Visnjan Observatory, Tican 894
9 G96 Mt. Lemmon Survey 672
10 033 Karl Schwarzschild Observatory, Tautenburg 671

Last 1 year (2021-08-17 to 2022-08-17)

# Observatory Total MPECs
1 F52 Pan-STARRS 2, Haleakala 167
2 G96 Mt. Lemmon Survey 116
3 F51 Pan-STARRS 1, Haleakala 105
4 703 Catalina Sky Survey 75
5 K88 GINOP-KHK, Piszkesteto 9
6 I41 Palomar Mountain--ZTF 8
7 V00 Kitt Peak-Bok 5
8 807 Cerro Tololo Observatory, La Serena 4
9 W68 ATLAS Chile, Rio Hurtado 4
10 U68 JPL SynTrack Robotic Telescope, Auberry 3

Last 5 years (2017-08-18 to 2022-08-17)

# Observatory Total MPECs
1 F51 Pan-STARRS 1, Haleakala 924
2 F52 Pan-STARRS 2, Haleakala 735
3 G96 Mt. Lemmon Survey 349
4 703 Catalina Sky Survey 169
5 I41 Palomar Mountain--ZTF 37
6 K88 GINOP-KHK, Piszkesteto 20
7 T08 ATLAS-MLO, Mauna Loa 13
8 T05 ATLAS-HKO, Haleakala 11
9 W84 Cerro Tololo-DECam 10
10 568 Mauna Kea 10

All time (since 1993-09-19)

# Observatory Total MPECs
1 F51 Pan-STARRS 1, Haleakala 1115
2 F52 Pan-STARRS 2, Haleakala 740
3 G96 Mt. Lemmon Survey 405
4 703 Catalina Sky Survey 216
5 704 Lincoln Laboratory ETS, New Mexico 75
6 691 Steward Observatory, Kitt Peak-Spacewatch 47
7 I41 Palomar Mountain--ZTF 39
8 699 Lowell Observatory-LONEOS 28
9 644 Palomar Mountain/NEAT 22
10 K88 GINOP-KHK, Piszkesteto 20