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Sormano Astronomical Observatory: CCEL
Cometary Close Encounters List

Last update: July 09, 2017

Computations: Francesco Manca , Piero Sicoli , Augusto Testa (obs.sormano@alice.it).


This table includes Comets with MOID (Minimum Orbital Intersection Distance) lower than 0.0350 AU with respect to planets Mercury, Venus, Earth and Mars.

Using a software developed at Sormano Observatory by A. Testa, their motions have been integrated for one hundred years to point out approaches within 0.0750 A.U. from each planet. Encounters for Disappeared or Lost Comets (DL) , and Sungrazing (SG) comets have not been taking into account.

MOID and possible approaches to planets for Long Period comets or in Parabolic and Hyperbolic orbits are also considered at the time of their apparition.

The list is a complement of our PCEL page that includes close approaches of asteroids to planets Mercury, Venus and Mars for the next two hundred years.

All the distances are computed between the centers of mass of the bodies (Comets and Planets).

 



Mercury
Venus
Earth
Mars


This section, in addition to the form at the end of this page, links directly to the Minor Planet Center's Ephemeris Service to provide up to date positions of all the objects listed below. Astrometric observations of any of the following objects should be sent directly to obs@cfa.harvard.edu

By default, ephemerides are for 10 hours at 1 hour intervals and suppress outputs if the object is below local horizon. This service utilises the Minor Planet Ephemeris Service, courtesy of Minor Planet Center.

Display ephemerides or summary

___Mercury___.

Ephem
.
.
___ Object
_
_____________________________
Planet's
MOID
____ (AU)_____
Status
_____
.
__PREDICTED CLOSE ENCOUNTERS_
__________Date ______Nominal
_______yyyymmdd___Distance (AU)___
2P (Encke) 0.0248 __ 2079-11-14 _____ 0.0512
2126-02-11 _____ 0.0495
323P (SOHO) 0.0001 SG __
342P (SOHO) 0.0194 SG __
C/1989 A3 (Bradfield) 0.0018 __ no close encounters
C/2002 S7 (SOHO) 0.0130 SG __
D/1766 G1 (Helfenzrieder) 0.0131 DL __


____Venus_____

Ephem
.
.
___ Object
_
_____________________________
Planet's
MOID
____ (AU)_____
Status
_____
.
__PREDICTED CLOSE ENCOUNTERS_
__________Date ______Nominal
_______yyyymmdd___Distance (AU)___
45P (Honda-Mrkos-Pajdusakova) 0.0018 __ no close encounters
249P (LINEAR) 0.0274 __ no close encounters
323P (SOHO) 0.0208 SG __
C/1917 F1 (Mellish) 0.0084 __ no close encounters
D/1770 L1 (Lexell) 0.0109 DL __
P/2005 T4 (SWAN) 0.0339 __ no close encounters
P/2007 T2 (Kowalski) 0.0118 __ no close encounters
P/2008 Y12 (SOHO) 0.0211 SG __
P/2010 H3 (SOHO) 0.0148 __ no close encounters


____Earth_____

Ephem
.
.
___ Object
_
_____________________________
Planet's
MOID
____ (AU)_____
Status
_____
.
__PREDICTED CLOSE ENCOUNTERS_
__________Date ______Nominal
_______yyyymmdd___Distance (AU)___
3D (Biela) 0.0001 DL __
15P (Finlay) 0.0098 __ 2060-10-25 _____ 0.0392
21P (Giacobini-Zinner) 0.0347 __ no close encounters
55P (Tempel-Tuttle) 0.0079 __ no close encounters
73P/Schwassmann-Wachmann 3 0.0146 __ no close encounters
73P/Schwassmann-Wachmann 3-BT 0.0147 __ no close encounters
109P (Swift-Tuttle) 0.0009 __ no close encounters
209P (LINEAR) 0.0029 __ no close encounters
252P (LINEAR) 0.0124 __ 2016-03-21 _____ 0.0358
2032-03-16 _____ 0.0587
255P (LEVY) 0.0241 __ no close encounters
289P (Blanpain) 0.0153 __ no close encounters
300P (Catalina) 0.0241 __ 2036-06-09 _____ 0.0504
320P (McNaught) 0.0321 __ no close encounters
323P (SOHO) 0.0298 SG __
D/1770 L1 (Lexell) 0.0143 DL __
P/2009 WX51 (Catalina) 0.0076 __ 2037-04-18 _____ 0.0523
P/2010 H3 (SOHO) 0.0140 SG __
P/2016 BA14 (PANSTARRS) 0.0163 __ 2016-03-22 _____ 0.0236
C/2016 VZ18 (PANSTARRS) 0.0196 __ no close encounters
C/2017 E4 (Lovejoy) 0.0317 __ no close encounters


_____Mars_____

Ephem
.
.
___ Object
_
_____________________________
Planet's
MOID
____ (AU)_____
Status
_____
.
__PREDICTED CLOSE ENCOUNTERS_
__________Date ______Nominal
_______yyyymmdd___Distance (AU)___
6P (d'Arrest) 0.0176 __ no close encounters
9P (Tempel) 0.0145 __ no close encounters
10P (Tempel) 0.0293 __ no close encounters
13P (Olbers) 0.0267 __ no close encounters
38P (Stephan-Oterma) 0.0261 __ no close encounters
45P (Honda-Mrkos-Pajdusakova) 0.0153 __ no close encounters
58P (Jackson-Neujmin) 0.0056 __ no close encounters
79P (du Toit-Hartley) 0.0131 __ no close encounters
81P (Wild) 0.0304 __ no close encounters
88P (Howell) 0.0093 __ 2031-09-13 _____ 0.0745
107P (Wilson-Harrington) 0.0304 __ no close encounters
114P (Wiseman-Skiff) 0.0118 __ no close encounters
124P (Mrkos) 0.0050 __ no close encounters
144P (Kushida) 0.0265 __ 2119-05-14 _____ 0.0209
201P (LONEOS) 0.0049 __ no close encounters
207P (NEAT) 0.0282 __ no close encounters
249P (LINEAR) 0.0288 __ no close encounters
275P (Hermann) 0.0204 __ no close encounters
294P (LINEAR) 0.0196 __ no close encounters
304P (Ory) 0.0041 __ 2070-02-24 _____ 0.0749
2092-04-17 _____ 0.0173
305P (Skiff) 0.0069 __ no close encounters
323P (SOHO) 0.0190 SG __
335P (Gibbs) 0.0254 __ no close encounters
C/2013 X1 (PANSTARRS) 0.0316 __ no close encounters
C/2014 W9 (PANSTARRS) 0.0265 __ no close encounters
C/2015 ER61 (PANSTARRS) 0.0003 __ no close encounters
D/1884 O1 (Barnard_1) 0.0084 DL __
D/1895 Q1 (Swift) 0.0057 DL __
P/2010 B2 (WISE) 0.0251 __ no close encounters
P/2014 U2 (Kowalski) 0.0158 __ no close encounters


Start date for ephemerides: Number of dates to output

Ephemeris interval: Ephemeris units: days hours minutes seconds

For daily ephemerides, enter desired offset from 0h UT: hours

Observatory code:

Display positions in: truncated sexagesimal or full sexagesimal or decimal units

Display motions as: "/sec "/min "/hr °/day

Suppress output if sun above local horizon

Suppress output if object below local horizon

Total motion and direction Separate R.A. and Decl. sky motions Separate R.A. and Decl. coordinate motions

Generate perturbed ephemerides for unperturbed orbits

Format for elements output:

none MPC 1-line MPC 8-line


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Web Curators: M. Carpino, F. Manca
Last modified: July 09, 2017