C/2014 E2 (Jacques)

C/2014 E2 (Jacques), provisionally designated as S002692,[2] is a long-period comet discovered by the Brazilian astronomers Cristóvão Jacques Lage de Faria, Eduardo Pimentel and João Ribeiro de Barros on the night of 13 March 2014.[3] It was the second comet discovered by the SONEAR Observatory team after comet C/2014 A4.

C/2014 E2 (Jacques)
C2014 E2 (Jacques).jpg
Image of 2014 E2 (Jacques) in 24 August 2014
Discovered byCristóvão Jacques
Eduardo Pimentel
João Ribeiro de Barros
Discovery date13 March 2014
Orbital characteristics [Heavens AboveIAU Minor Planet Center A]
Epoch2014 May 23.0 TT
(JD 2456800.5)
Aphelion~1600 AU (epoch 1950)[1]
Perihelion0.6638 AU (q)
Eccentricity0.99912 (e)
Orbital period~22,000 years inbound (Barycentric solution for epoch 1950)[1]
~12,000 years outbound
(Barycentric solution for epoch 2050)[1]
Avg. orbital speed27 km/s
Max. orbital speed51.7 km/s
Inclination156.4° (i)
Last perihelion2014 July 2


Observations were made with a 0.45-meter (17.7-inch) f/2.9 wide-field reflector telescope with equatorial assembly and CCD camera at the Southern Observatory for Near Earth Asteroids Research (SONEAR), located near Oliveira, Minas Gerais, Brazil.[4]

In late March 2014, C/2014 E2 (Jacques) appeared to contain a dense, bright coma (11.5-12 magnitude), visible with an 8-inch telescope.[4] It crossed the celestial equator on 8 May 2014 becoming a northern hemisphere object.[5] From 3 June 2014 until 17 July 2014 it had an elongation less than 30 degrees from the Sun.[5] The comet was visible in LASCO C3 on 21 June 2014.[6] C/2014 E2 peaked around apparent magnitude 6 in mid-July and was visible in binoculars above the glow of morning twilight.[7][8]

C/2014 E2 passed 0.085 AU (12,700,000 km; 7,900,000 mi) from Venus on 13 July 2014.[9] On 20 July 2014 the comet was near the naked eye star Beta Tauri.[10] On 22 August 2014 it passed Epsilon Cassiopeiae. It reached perigee (closest approach to Earth) on 28 August 2014, at 0.56 AU (84,000,000 km; 52,000,000 mi).[2] The comet passed about 3 degrees from Deneb from 4–5 September 2014.[11] On 14 September the comet was near Albireo.[12]

By October 2014 the comet had fainted to magnitude 10.[13]


  1. ^ a b c Horizons output. "Barycentric Osculating Orbital Elements for Comet C/2014 E2 (Jacques)". (Solution using the Solar System Barycenter and barycentric coordinates. Select Ephemeris Type:Elements and Center:@0)
  2. ^ a b "C/2014 E2 Jacques" (in Portuguese). Costeira1 e Cometas/REA. Retrieved 2014-03-31.
  3. ^ Villamarin, Jenalyn (2014-03-17). "2014 Comet Jacques: SONEAR Team in Brazil Spots New Comet C/2014 E2, Closest Approach to the Sun to Occur on June 29". International Business Times AU. Archived from the original on 2014-03-28. Retrieved 2014-03-31.
  4. ^ a b King, Bob (2014-03-15). "New Comet Jacques May Pass 8.4 million miles from Venus this July". Universe Today. Retrieved 2014-03-31.
  5. ^ a b "Elements and Ephemeris for C/2014 E2 (Jacques)". The International Astronomical Union Minor Planet Center. Archived from the original on 2014-10-26. Retrieved 2014-06-15.
  6. ^ Rob Kaufman – comets-ml
  7. ^ Yoshida, Seiichi (2014-07-20). "Weekly Information about Bright Comets (2014 July 19: North)". aerith.net. Retrieved 2014-10-21.
  8. ^ Seiichi Yoshida. "C/2014 E2 ( Jacques )". Seiichi Yoshida's Comet Catalog. Retrieved 2014-06-15.
  9. ^ "JPL Close-Approach Data: C/2014 E2 (Jacques)" (last observation: 2014-10-05; arc: 206 days). Retrieved 2014-04-30.
  10. ^ "Catch Comet Jacques near Venus at dawn". AstroBob. 2014-07-15. Retrieved 2014-07-20.
  11. ^ https://www.flickr.com/photos/47833278@N02/14962858201/
  12. ^ David Dickinson (2014-09-09). "Tales (Tails?) Of Three Comets". Universe Today. Retrieved 2014-09-12.
  13. ^ Yoshida, Seiichi (2014-10-05). "Weekly Information about Bright Comets (2014 Oct. 4: North)". aerith.net. Retrieved 2014-10-21.

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