C/2018 C2 (Lemmon)

For other comets discovered by the Mount Lemmon Survey, see Comet Lemmon.
C/2018 C2 (Lemmon)
Annual motion through the Solar System
Discovery [1][2]
Discovered byMount Lemmon Srvy.
Discovery siteMount Lemmon Obs.
Discovery date5 February 2018
(first observed only)
Designations
C/2018 C2 (Lemmon)
ZC82561, A/2018 C2
hyperbolic comet [3]
Orbital characteristics [3]
Epoch 20 May 2018 (JD 2458258.5)
Observation arc272 days
Perihelion1.9565 AU
−1083±3 AU[a]
Eccentricity1.0018
0.99924 (Barycentric epoch 2200)[4]
≈ 130,000 years (outbound)[4]
-0.00036
0° 0m 0.072s / day
Inclination34.453°
91.14°
134.14°
Earth MOID1.062 AU
Jupiter MOID1.405 AU
Physical characteristics
Dimensions1.7–7.6 km (assumed)
19.0 (March 2018)
15.1±0.63

C/2018 C2 (Lemmon) is a hyperbolic comet (previously classified as A/2018 C2, a hyperbolic asteroid). It was first observed on 5 February 2018 by the Mount Lemmon Survey conducted at the Mount Lemmon Observatory near Tucson, Arizona, in the United States.[1] The discovery was announced on 4 March 2018 along with another hyperbolic object, A/2017 U7.[2] Based on the absolute magnitude of 15.1, it may measure several kilometers in diameter.[5] On 22 March 2018 it was determined to be a hyperbolic comet.[6]

  1. ^ a b Cite error: The named reference MPC-object was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference MPEC2018-E18 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference jpldata was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference barycenter was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference h was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference MPEC2018-F136 was invoked but never defined (see the help page).


Cite error: There are <ref group=lower-alpha> tags or {{efn}} templates on this page, but the references will not show without a {{reflist|group=lower-alpha}} template or {{notelist}} template (see the help page).