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| discovery_date=2006-Oct-02<ref name=jpldata/>
| discovery_date=2006-Oct-02<ref name=jpldata/>
| designations=
| designations=
| epoch=2006-Nov-22<ref name=jpldata/><br/>([[Julian day|JD]] 2454061.5)
| epoch=2014-Nov-20<ref name=jpldata/><br/>([[Julian day|JD]] 2456981.5)
| Earth_moid = {{Convert|0.025|AU|km|abbr=on}}<ref name=jpldata/>
| semimajor=3.020 AU (a)
| perihelion=0.9895 AU (q)
| semimajor=3.038 AU (a)
| aphelion=5.051 [[Astronomical Unit|AU]] (Q)
| perihelion=1.008 AU (q)
| aphelion=5.069 [[Astronomical Unit|AU]] (Q)
| eccentricity=0.6723
| eccentricity=0.6682
| period=5.25 [[Julian year (astronomy)|yr]]
| period=5.30 [[Julian year (astronomy)|a]]
| inclination=18.32°
| inclination=18.27°
| last_p=2012-Jan-14<ref name="mpcdata"/><br>2006-Oct-07<ref name=jpldata/>
| next_p=2017-May-03<ref name="NK2187"/>
| last_p=2022-Sep-07<ref name="Horizons2022"/><br/>2017-May-03<ref name=MPC/><ref name="NK2187"/><br/>2012-Jan-14<ref name=MPC/><br/>2006-Oct-07<ref name="mpcdata"/>
| next_p=2027-Sep-25<ref name="Horizons2027">{{cite web
|title=Horizons Batch for 255P/Levy on 2027-Sep-25
|publisher=[[JPL Horizons On-Line Ephemeris System|JPL Horizons]]
|type=Perihelion occurs when rdot flips from negative to positive
|url=https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%27255P%27&START_TIME=%272027-Sep-25%27&STOP_TIME=%272027-Sep-26%27&STEP_SIZE=%273%20hours%27&QUANTITIES=%2719%27
|accessdate=2023-04-30}} (JPL#40/Soln.date: 2021-Oct-18)</ref>
}}
}}


'''255P/Levy''', formerly '''P/2006 T1''' and '''P/2011 Y1''', is a [[List of periodic comets|periodic]] [[comet]] with an orbital period of 5.25 years.<ref name=jpldata/> It last came to [[perihelion]] (closest approach to the Sun) on 14 January 2012.<ref name="mpcdata"/> During the 2006 passage the comet achieved an [[apparent magnitude]] of ~9.5.<ref name="apmag2006"/> Levy (PK06T010) was believed to have been recovered on 3 June 2011 at magnitude 19.8,<ref name="MPEC2011-L51"/> 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.<ref name="MPEC2011-Y07"/> It was then numbered.
'''255P/Levy''', formerly '''P/2006 T1''' and '''P/2011 Y1''', is a [[List of periodic comets|periodic]] [[comet]] with an orbital period of 5.25 years.<ref name=jpldata/> It last came to [[perihelion]] (closest approach to the Sun) on 14 January 2012.<ref name="mpcdata"/> During the 2006 passage the comet achieved an [[apparent magnitude]] of ~9.5.<ref name="apmag2006"/> Levy (PK06T010) was believed to have been recovered on 3 June 2011 at magnitude 19.8,<ref name="MPEC2011-L51"/> 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.<ref name="MPEC2011-Y07"/> It was then numbered.


The last perihelion passage was on 14 January 2012 at a distance of 1.007&nbsp;[[Astronomical unit|AU]] from the Sun.<ref name=mpcdata/> The comet passed the Earth on 2012-Jan-26 at a distance of {{convert|0.2359|AU|km mi|abbr=on|lk=on}}.<ref name=jpl-close/> 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. [[Minor Planet Center|MPC]] estimates after the 2011 recovery estimated that it would reach a magnitude of 17, and it had an [[Elongation (astronomy)|elongation]] of 90°.<ref name="MPC"/> However, CCD images showed it was diffuse<ref name="weeklyinfo"/> and the comet's magnitude was estimated at 14.1 on 30 December 2011.<ref name="novichonok-obs"/>
It came to perihelion on 14 January 2012 at a distance of 1.007&nbsp;[[Astronomical unit|AU]] from the Sun.<ref name=mpcdata/> The comet passed the Earth on 2012-Jan-26 at a distance of {{convert|0.2359|AU|km mi|abbr=on|lk=on}}.<ref name=jpl-close/> 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. [[Minor Planet Center|MPC]] estimates after the 2011 recovery estimated that it would reach a magnitude of 17, and it had an [[Elongation (astronomy)|elongation]] of 90°. However, CCD images showed it was diffuse<ref name="weeklyinfo"/> and the comet's magnitude was estimated at 14.1 on 30 December 2011.<ref name="novichonok-obs"/> The comet was not observed during the 2017 or 2022 perihelion passage.<ref name=MPC/> At [[Opposition (planets)|opposition]] in August 2016 it would have been dimmer than magnitude 19.

255P/Levy currently has an Earth-[[Minimum orbit intersection distance|MOID]] of {{convert|0.025|AU|km mi|abbr=on|lk=on}}.<ref name=jpldata/>

The comet has been associated with α Cepheids [[meteor shower]], which peaks on 2 January.<ref>{{cite journal |last1=Šegon |first1=Damir |last2=Gural |first2=Peter |last3=Andreić |first3=Željko |last4=Skokić |first4=Ivica |last5=Korlević |first5=Korado |last6=Vida |first6=Denis |last7=Novoselnik |first7=Filip |title=New showers from parent body search across several video meteor databases |journal=WGN, Journal of the International Meteor Organization |date=1 April 2014 |volume=42 |issue=2 |pages=57–64 |bibcode=2014JIMO...42...57S |url=https://articles.adsabs.harvard.edu/pdf/2014JIMO...42...57S |issn=1016-3115}}</ref>


== References ==
== References ==
{{reflist
{{Reflist
| refs =
| refs =


<ref name=jpldata>{{cite web
<ref name=jpldata>{{cite web
|date=2011-12-17 last obs (arc=5.21 years)
|type=last observation: 2012-01-25; [[Observation arc|arc]]: 5.31 years
|title=JPL Small-Body Database Browser: P/2006 T1 (Levy)
|title=JPL Small-Body Database Browser: P/2006 T1 (Levy)
|url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2006T1
|url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2006T1
|publisher=Jet Propulsion Laboratory
|publisher=[[Jet Propulsion Laboratory]]
|accessdate=2011-12-20}}</ref>
|access-date=2016-01-10}}</ref>


<ref name="mpcdata">{{cite web
<ref name="mpcdata">{{cite web
|date=2011-12-17 (last obs)
|type=last observation: 2011-12-17
|title=P/2006 T1 (Levy)
|title=P/2006 T1 (Levy)
|publisher=[[Minor Planet Center]]
|publisher=[[Minor Planet Center]]
|url=http://www.minorplanetcenter.net/db_search/show_object?object_id=P/2006+T1&commit=Show
|url=http://www.minorplanetcenter.net/db_search/show_object?object_id=P/2006+T1&commit=Show
|accessdate=2011-12-18}}</ref>
|access-date=2011-12-18}}</ref>


<ref name="NK2187">{{cite web
<ref name="NK2187">{{cite web
|date=2012-01-02
|date=2012-01-02
|title=P/Levy (2006 T1 = 2011 Y1) (NK 2187)
|title=P/Levy (2006 T1 = 2011 Y1) (NK 2187)
|publisher=OAA Computing and Minor Planet Sections
|publisher=OAA Computing and Minor Planet Sections
|author=Syuichi Nakano
|author=Syuichi Nakano
|url=http://www.oaa.gr.jp/~oaacs/nk/nk2187.htm
|url=http://www.oaa.gr.jp/~oaacs/nk/nk2187.htm
|accessdate=2012-02-18}}</ref>
|access-date=2012-02-18}}</ref>


<ref name="apmag2006">{{cite web
<ref name="apmag2006">{{cite web
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|publisher=aerith.net
|publisher=aerith.net
|url=http://www.aerith.net/comet/catalog/0255P/mag.gif
|url=http://www.aerith.net/comet/catalog/0255P/mag.gif
|accessdate=2011-04-07}}</ref>
|access-date=2011-04-07}}</ref>


<ref name="MPEC2011-L51">{{cite web
<ref name="MPEC2011-L51">{{cite web
|date=2011-06-12
|date=2011-06-12
|title=MPEC 2011-L51 : OBSERVATIONS AND ORBITS OF COMETS
|title=MPEC 2011-L51 : OBSERVATIONS AND ORBITS OF COMETS
|publisher=IAU Minor Planet Center
|publisher=[[IAU Minor Planet Center]]
|url=http://www.minorplanetcenter.net/mpec/K11/K11L51.html
|url=http://www.minorplanetcenter.net/mpec/K11/K11L51.html
|accessdate=2011-06-13}}</ref>
|access-date=2011-06-13}}</ref>


<ref name="MPEC2011-Y07">{{cite web
<ref name="MPEC2011-Y07">{{cite web
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|publisher=IAU Minor Planet Center
|publisher=IAU Minor Planet Center
|url=http://www.minorplanetcenter.net/mpec/K11/K11Y07.html
|url=http://www.minorplanetcenter.net/mpec/K11/K11Y07.html
|accessdate=2011-12-18}}</ref>
|access-date=2011-12-18}}</ref>


<ref name=jpl-close>{{cite web
<ref name=jpl-close>{{cite web
|date=2011-12-30 last obs (arc=5.24 years)
|type=last observation: 2011-12-30; [[Observation arc|arc]]: 5.24 years
|title=JPL Close-Approach Data: P/2006 T1 (Levy)
|title=JPL Close-Approach Data: P/2006 T1 (Levy)
|url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2006T1;cad=1#cad
|url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2006T1;cad=1#cad
|accessdate=2012-01-04}}</ref>
|access-date=2012-01-04}}</ref>


<ref name="MPC">{{cite web
<ref name=MPC>{{cite web
|title=Elements and Ephemeris for P/2006 T1 (Levy)
|title=255P/Levy Orbit
|url=http://www.minorplanetcenter.net/db_search/show_object?object_id=255P
|publisher=IAU Minor Planet Center
|publisher=[[Minor Planet Center]]
|url=http://scully.cfa.harvard.edu/cgi-bin/returnprepeph.cgi?d=c&o=0255P
|accessdate=2011-12-18}}</ref>
|access-date=2014-06-20}}</ref>


<ref name="weeklyinfo">{{cite web
<ref name="weeklyinfo">{{cite web
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|publisher=aerith.net
|publisher=aerith.net
|url=http://www.aerith.net/comet/weekly/20111224n.html
|url=http://www.aerith.net/comet/weekly/20111224n.html
|accessdate=2012-01-04}}</ref>
|access-date=2012-01-04}}</ref>


<ref name="novichonok-obs">{{cite web
<ref name="novichonok-obs">
{{cite web
|title=CCD comet estimates
|title=CCD comet estimates
|date=2012-01-01
|date=2012-01-01
|publisher=severastro.narod.ru
|publisher=severastro.narod.ru
|url=http://severastro.narod.ru/nabl/novichonok/icq_may.txt
|url=http://severastro.narod.ru/nabl/novichonok/icq_may.txt
|accessdate=2012-01-04}}</ref>
|access-date=2012-01-04
|archive-url=https://web.archive.org/web/20120422173100/http://severastro.narod.ru/nabl/novichonok/icq_may.txt
|archive-date=2012-04-22
|url-status=dead
}}
</ref>

<ref name="Horizons2022">{{cite web
|title=Horizons Batch for 255P/Levy on 2022-Sep-07
|publisher=[[JPL Horizons On-Line Ephemeris System|JPL Horizons]]
|type=Perihelion occurs when rdot flips from negative to positive
|url=https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%27255P%27&START_TIME=%272022-Sep-07%27&STOP_TIME=%272022-Sep-08%27&STEP_SIZE=%273%20hours%27&QUANTITIES=%2719%27
|accessdate=2023-04-30}} (JPL#40/Soln.date: 2021-Oct-18)</ref>


}}
}}
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== External links ==
== External links ==
* [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2006T1;orb=1 Orbital simulation] from JPL (Java) / [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2006T1 Horizons Ephemeris]
* [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2006T1;orb=1 Orbital simulation] from JPL (Java) / [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2006T1 Horizons Ephemeris]
* [https://web.archive.org/web/20160304112122/http://scully.cfa.harvard.edu/cgi-bin/returnprepeph.cgi?d=c&o=0255P Elements and Ephemeris for 255P/Levy] – [[Minor Planet Center]]
* [http://www.minorplanetcenter.net/db_search/show_object?object_id=P/2006+T1&commit=Show P/2006 T1 (Levy)] at the [[Minor Planet Center]]'s Database
* [http://www.minorplanetcenter.net/db_search/show_object?object_id=P/2006+T1&commit=Show P/2006 T1 (Levy)] at the [[Minor Planet Center]]'s Database
* [http://www.aerith.net/comet/catalog/0255P/index.html 255P/Levy] - Seiichi Yoshida @ aerith.net (with pictures taken by different astronomers around the world)
* [http://www.aerith.net/comet/catalog/0255P/index.html 255P/Levy] - Seiichi Yoshida @ aerith.net (with pictures taken by different astronomers around the world)
* [http://www.birtwhistle.org/GalleryC2006T1.htm P/2006 T1 (Levy)] as seen at the Great Shefford Observatory in 2006
* [http://www.birtwhistle.org/GalleryC2006T1.htm P/2006 T1 (Levy)] {{Webarchive|url=https://web.archive.org/web/20110719071635/http://www.birtwhistle.org/GalleryC2006T1.htm |date=2011-07-19 }} as seen at the Great Shefford Observatory in 2006

{{Comets}}
{{Comets}}
{{Authority control}}
⚫
{{DEFAULTSORT:255P Levy}}

⚫
[[Category:Comets]]
⚫
{{DEFAULTSORT:Levy, 255P}}
[[Category:Periodic comets]]
[[Category:Near-Earth comets|255P]]
[[Category:Numbered comets|0255]]
[[Category:Discoveries by David H. Levy|255P Levy]]
⚫
[[Category:Comets in 2017]]
[[Category:Astronomical objects discovered in 2006|20061002]]

Latest revision as of 05:52, 12 May 2024

255P/Levy
Discovery
Discovered byDavid H. Levy
Discovery date2006-Oct-02[1]
Orbital characteristics
Epoch2014-Nov-20[1]
(JD 2456981.5)
Aphelion5.069 AU (Q)
Perihelion1.008 AU (q)
Semi-major axis3.038 AU (a)
Eccentricity0.6682
Orbital period5.30 a
Inclination18.27°
Last perihelion2022-Sep-07[2]
2017-May-03[3][4]
2012-Jan-14[3]
2006-Oct-07[5]
Next perihelion2027-Sep-25[6]
Earth MOID0.025 AU (3,700,000 km)[1]

255P/Levy, formerly P/2006 T1 and P/2011 Y1, is a periodic comet with an orbital period of 5.25 years.[1] 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.[7] Levy (PK06T010) was believed to have been recovered on 3 June 2011 at magnitude 19.8,[8] 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.[9] 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).[10] 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[11] and the comet's magnitude was estimated at 14.1 on 30 December 2011.[12] The comet was not observed during the 2017 or 2022 perihelion passage.[3] At opposition in August 2016 it would have been dimmer than magnitude 19.

255P/Levy currently has an Earth-MOID of 0.025 AU (3,700,000 km; 2,300,000 mi).[1]

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

References

[edit]
  1. ^ a b c d e "JPL Small-Body Database Browser: P/2006 T1 (Levy)" (last observation: 2012-01-25; arc: 5.31 years). Jet Propulsion Laboratory. Retrieved 2016-01-10.
  2. ^ "Horizons Batch for 255P/Levy on 2022-Sep-07" (Perihelion occurs when rdot flips from negative to positive). JPL Horizons. Retrieved 2023-04-30. (JPL#40/Soln.date: 2021-Oct-18)
  3. ^ a b c "255P/Levy Orbit". Minor Planet Center. Retrieved 2014-06-20.
  4. ^ Syuichi Nakano (2012-01-02). "P/Levy (2006 T1 = 2011 Y1) (NK 2187)". OAA Computing and Minor Planet Sections. Retrieved 2012-02-18.
  5. ^ a b c "P/2006 T1 (Levy)" (last observation: 2011-12-17). Minor Planet Center. Retrieved 2011-12-18.
  6. ^ "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)
  7. ^ "P/2006 T1 Comet for Windows apmag graph for 2006". aerith.net. Retrieved 2011-04-07.
  8. ^ "MPEC 2011-L51 : OBSERVATIONS AND ORBITS OF COMETS". IAU Minor Planet Center. 2011-06-12. Retrieved 2011-06-13.
  9. ^ "MPEC 2011-Y07 : P/2006 T1 = 2011 Y1 (Levy)". IAU Minor Planet Center. 2011-12-18. Retrieved 2011-12-18.
  10. ^ "JPL Close-Approach Data: P/2006 T1 (Levy)" (last observation: 2011-12-30; arc: 5.24 years). Retrieved 2012-01-04.
  11. ^ "Weekly Information about Bright Comets (2011 Dec. 24: North)". aerith.net. 2011-12-27. Retrieved 2012-01-04.
  12. ^ "CCD comet estimates". severastro.narod.ru. 2012-01-01. Archived from the original on 2012-04-22. Retrieved 2012-01-04.
  13. ^ Šegon, Damir; Gural, Peter; Andreić, Željko; Skokić, Ivica; Korlević, Korado; Vida, Denis; Novoselnik, Filip (1 April 2014). "New showers from parent body search across several video meteor databases". WGN, Journal of the International Meteor Organization. 42 (2): 57–64. Bibcode:2014JIMO...42...57S. ISSN 1016-3115.
[edit]
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