255P/Levy

255P/Levy
Discovery[1]
Discovered byDavid H. Levy
Discovery siteJarnac Observatory (G92)
Discovery date2 October 2006
Designations
P/2006 T1
P/2011 Y1
PK06T010
Orbital characteristics[4]
Epoch22 December 2007 (JD 2454456.5)
Observation arc5,484 days (15 years)
Number of
observations		503
Aphelion5.069 AU
Perihelion1.008 AU
Semi-major axis3.024 AU
Eccentricity0.672
Orbital period5.30 years
Inclination18.27°
279.780°
Argument of
periapsis		179.593°
Last perihelion7 September 2022[2]
Next perihelion25 September 2027[3]
TJupiter2.792
Earth MOID0.0088 AU
Jupiter MOID0.1539 AU
Physical characteristics
Comet total
magnitude (M1)		11.5
Comet nuclear
magnitude (M2)		15.1
9.5
(2006 apparition)

255P/Levy, formerly P/2006 T1 and P/2011 Y1, is a periodic comet with an orbital period of 5.25 years.[4] It last came to perihelion (closest approach to the Sun) on 14 January 2012.[5] During the 2006 passage the comet achieved an apparent magnitude of ~9.5.[6] Levy (PK06T010) was believed to have been recovered on 3 June 2011 at magnitude 19.8,[7] but other observatories were unable to confirm a recovery. It was most likely a false positive because of large residuals. Levy was recovered on 17 December 2011 at magnitude 19.8, and given the second designation 2011 Y1.[8] It was then numbered.

It came to perihelion on 14 January 2012 at a distance of 1.007 AU from the Sun.[5] The comet passed the Earth on 2012-Jan-26 at a distance of 0.2359 AU (35,290,000 km; 21,930,000 mi).[9] During the 2012 passage the comet was originally expected to reach an apparent magnitude of 7, but the comet had been in outburst in 2006 and was much dimmer than expected when it was recovered in 2011. MPC estimates after the 2011 recovery estimated that it would reach a magnitude of 17, and it had an elongation of 90°. However, CCD images showed it was diffuse[10] and the comet's magnitude was estimated at 14.1 on 30 December 2011.[11] The comet was not observed during the 2017 or 2022 perihelion passage.[12] At opposition in August 2016 it would have been dimmer than magnitude 19.

255P/Levy currently has an Earth-MOID of 0.0088 AU (1,320,000 km; 820,000 mi).[4]

The comet has been associated with α Cepheids meteor shower, which peaks on 2 January.[13]

  1. ^ Cite error: The named reference MPEC-2006-T21 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference Horizons2022 was invoked but never defined (see the help page).
  3. ^ "Horizons Batch for 255P/Levy on 2027-Sep-25" (Perihelion occurs when rdot flips from negative to positive). JPL Horizons. Retrieved 2023-04-30. (JPL#40/Soln.date: 2021-Oct-18)
  4. ^ a b c Cite error: The named reference jpldata was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference mpcdata was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference apmag2006 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference MPEC-2011-L51 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference MPEC-2011-Y07 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference jpl-close was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference weeklyinfo was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference novichonok-obs was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference MPC was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Segon_2014 was invoked but never defined (see the help page).