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{{Short description|Periodic comet with 6 year orbit}}
⚫
{{Infobox Comet
| name=57P/du Toit–Neujmin–Delporte
{{DISPLAYTITLE:''57P/du Toit–Neujmin–Delporte''}}
⚫
{{Infobox comet
| image=
| name=57P/du Toit–Neujmin–Delporte
| image=57P_2015-06-13_NEOWISE_image_3-color.png
| discoverer=[[Daniel du Toit]],<br/>[[Grigory N. Neujmin]],<br/>[[Eugène Joseph Delporte]]
| discoverer=[[Daniel du Toit]],<br/>[[Grigory N. Neujmin]],<br/>[[Eugène Joseph Delporte]]
| discovery_date=July 18, 1941
| discovery_date=July 18, 1941
Line 10: Line 12:
| aphelion= 5.176218 [[Astronomical Unit|AU]]
| aphelion= 5.176218 [[Astronomical Unit|AU]]
| eccentricity= 0.499108
| eccentricity= 0.499108
| period=6.42 [[Julian year (astronomy)|a]]
| period=6.42 [[Julian year (astronomy)|yr]]
| inclination= 2.8447°
| inclination= 2.8447°
⚫
| last_p=October 17, 2021<ref name="Yoshida-57p"/><ref name="imcce">{{cite web
| last_p=December 25, 2008
⚫
| next_p=May 22, 2015<ref name="Yoshida-57p">{{cite web
⚫
|date=2010-03-24
⚫
|title=57P/du Toit-Neujmin-Delporte
⚫
|publisher=Seiichi Yoshida's Comet Catalog
⚫
|author=Seiichi Yoshida
⚫
|url=http://www.aerith.net/comet/catalog/0057P/index.html
|accessdate=2012-02-18}}</ref><ref name="imcce">{{cite web
|date=2009-11-24
|date=2009-11-24
|title=Note number : 0040 P/Du Toit-Neujmin-Delporte : 57P
|title=Note number : 0040 P/Du Toit-Neujmin-Delporte : 57P
|publisher=Institut de mecanique celeste et de calcul des ephemerides
|publisher={{ill|Institut de mécanique céleste et de calcul des éphémérides|fr}}
|author=Patrick Rocher
|author=Patrick Rocher
|url=http://www.imcce.fr/en/ephemerides/donnees/comets/FICH/CIF0040.php
|url=http://www.imcce.fr/en/ephemerides/donnees/comets/FICH/CIF0040.php
|accessdate=2012-02-19}}</ref><ref>[http://jcometobs.web.fc2.com/pcmtn/0057p.htm 57P past, present and future orbital elements] (Kazuo Kinoshita)</ref>
|access-date=2012-02-19}}</ref><ref>[http://jcometobs.web.fc2.com/pcmtn/0057p.htm 57P past, present and future orbital elements] (Kazuo Kinoshita)</ref><br/>May 22, 2015
| next_p=2028-Mar-03<ref name="Horizons2028"/>
}}
}}

'''57P/[[Daniel du Toit|du Toit]]–[[G. N. Neujmin|Neujmin]]–[[Eugène Joseph Delporte|Delporte]]''' is the designation of a [[List of periodic comets|periodic]] [[comet]]. In 2002 it was discovered to have broken up into at least 19 fragments.<ref name="ifa2002">{{cite web
'''''57P/[[Daniel du Toit|du Toit]]–[[G. N. Neujmin|Neujmin]]–[[Eugène Joseph Delporte|Delporte]]''''' is the designation of a [[List of periodic comets|periodic]] [[comet]]. It is a member of the [[Jupiter family]] of comets whose orbits and evolution are strongly influenced by the giant planet.<ref name=Fernández1999>{{cite journal
| title=The population, magnitudes, and sizes of Jupiter family comets
| last1=Fernández | first1=J. A. | last2=Tancredi | first2=G.
| last3=Rickman | first3=H. | last4=Licandro | first4=J.
| display-authors=1 | journal=Astronomy and Astrophysics
| volume=352 | pages=327–340 | date=December 1999
| bibcode=1999A&A...352..327F }}</ref> In 2002 it was discovered to have broken up into at least 20 fragments.<ref name="ifa2002">{{cite web
|year=2002
|year=2002
|title=Spectacular Comet Breakup
|title=Spectacular Comet Breakup
|publisher=Newsletter from the Institute for Astronomy, University of Hawaii (No.5 - Summer 2002)
|publisher=Newsletter from the Institute for Astronomy, University of Hawaii (No.5 - Summer 2002)
|url=http://ifa.hawaii.edu/newsletters/article.cfm?a=77&n=9
|url=http://ifa.hawaii.edu/newsletters/article.cfm?a=77&n=9
|accessdate=2011-08-29}}</ref>
|access-date=2011-08-29
|archive-url=https://web.archive.org/web/20141030042023/http://www2.ifa.hawaii.edu/newsletters/article.cfm?a=77&n=9
|archive-date=2014-10-30
|url-status=dead
}}</ref> At the time of their discovery, these shed fragments were spread out along the orbital path subtending an angle of 27&nbsp;[[arcminute]]s from the comet's surviving head.<ref name=Fernández2009>{{cite journal
| title=That's the way the comet crumbles: Splitting Jupiter-family comets
| last1=Fernández | first1=Yanga R.
| journal=Planetary and Space Science
| volume=57 | issue=10 | pages=1218–1227 | date=August 2009
| doi=10.1016/j.pss.2009.01.003 | arxiv=0907.4806
| bibcode=2009P&SS...57.1218F | s2cid=15153026 }}</ref>


== Discovery ==
== Discovery ==
The comet has many co-discoverers and a complicated discovery history due to unreliable communications during [[World War II]]. [[Daniel du Toit]] discovered the comet on July 18, 1941 working at [[Boyden Observatory|Boyden Station]], [[South Africa]]. His [[cable]]d message about the comet did not reach his employer, [[Harvard College Observatory]], until July 27. During a routine asteroid search, [[Grigory N. Neujmin]] ([[Simeis Observatory]], [[Soviet Union]]) found the comet on a [[photograph]]ic plate exposed July 25. He confirmed his own observation on July 29, but the [[radiogram (message)|radiogram]] from [[Moscow]] took 20 [[day]]s to reach Harvard. The official announcement of the new comet finally happened on August 20, 1941. A few days later, it became known that [[Eugène Joseph Delporte]] at the [[Observatoire Royal de Belgique|Royal Observatory]], [[Belgium]], also had found the comet on August 19, so he was added to the list of discoverers.
The comet has many co-discoverers and a complicated discovery history due to unreliable communications during [[World War II]]. [[Daniel du Toit]] discovered the comet (retrospectively designated as P/1941 O1) on July 18, 1941, working at [[Boyden Observatory|Boyden Station]], [[South Africa]]. His [[Cablegram|cabled]] message about the comet did not reach his employer, [[Harvard College Observatory]], until July 27. During a routine asteroid search, [[Grigory N. Neujmin]] ([[Simeis Observatory]], [[Soviet Union]]) found the comet on a [[photograph]]ic plate exposed July 25. He confirmed his own observation on July 29, but the [[radiogram (message)|radiogram]] from [[Moscow]] took 20 [[day]]s to reach Harvard. The official announcement of the new comet finally happened on August 20, 1941. A few days later, it became known that [[Eugène Joseph Delporte]] at the [[Observatoire Royal de Belgique|Royal Observatory]], [[Belgium]], also had found the comet on August 19, so he was added to the list of discoverers.


A few [[week]]s later, news from [[Paul Oswald Ahnert|Paul Ahnert]] at [[Sonneberg]], [[Thuringia]], [[Germany]], reached Harvard that he also observed the new comet on July 22, but it was too late to recognize his contribution.
A few [[week]]s later, news from [[Paul Oswald Ahnert|Paul Ahnert]] at [[Sonneberg]], [[Thuringia]], [[Germany]], reached Harvard that he also observed the new comet on July 22, but it was too late to recognize his contribution.

Fragment A was last observed in 2002.<ref name=57P-A/>


== References ==
== References ==
{{Reflist}}
{{Reflist|refs=

<ref name="Yoshida-57p">{{cite web
⚫
|date=2010-03-24
⚫
|title=57P/du Toit-Neujmin-Delporte
⚫
|publisher=Seiichi Yoshida's Comet Catalog
⚫
|author=Seiichi Yoshida
⚫
|url=http://www.aerith.net/comet/catalog/0057P/index.html
|access-date=2012-02-18}}</ref>

<ref name=57P-A>{{cite web
|type=last observation: 2002-12-06
|title=JPL Small-Body Database Browser: 57P/duToit-Neujmin-Delporte-A
|url=https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?des=57P-A
|publisher=[[Jet Propulsion Laboratory]]
|access-date=2020-07-04}}</ref>

<ref name="Horizons2028">{{cite web
|title=Horizons Batch for 57P/duToit-Neujmin-Delporte (90000632) on 2028-Mar-03
|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=%2790000632%27&START_TIME=%272028-Mar-01%27&STOP_TIME=%272028-Mar-05%27&STEP_SIZE=%273%20hours%27&QUANTITIES=%2719%27
|archive-url=https://web.archive.org/web/20220618150138/https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%2790000630%27&START_TIME=%272028-Mar-01%27&STOP_TIME=%272028-Mar-05%27&STEP_SIZE=%273%20hours%27&QUANTITIES=%2719%27
|archive-date=2022-06-18
|url-status=live
|accessdate=2023-02-11}} (JPL#K213/30 Soln.date: 2023-Apr-28)</ref>

}} <!-- end of notelist -->


== External links ==
== External links ==
* [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=57P;orb=1 Orbital simulation] from JPL (Java) / [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=57P Horizons Ephemeris]
* [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=57P;orb=1 Orbital simulation] from JPL (Java) / [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=57P Horizons Ephemeris]
*[http://cometography.com/pcomets/057p.html 57P/du Toit–Neujmin–Delporte] at [[Gary W. Kronk]]'s Cometography
* [http://www.aerith.net/comet/catalog/0057P/index.html 57P/du Toit-Neujmin-Delporte] – Seiichi Yoshida @ aerith.net
* [http://cometography.com/pcomets/057p.html 57P/du Toit–Neujmin–Delporte] at [[Gary W. Kronk]]'s Cometography


{{PeriodicComets Navigator|56P/Slaughter-Burnham|58P/Jackson-Neujmin}}
{{PeriodicComets Navigator|56P/Slaughter–Burnham|58P/Jackson–Neujmin}}
{{Comets}}
{{Authority control}}


{{DEFAULTSORT:du Toit-Neujmin-Delporte, 057P}}
{{DEFAULTSORT:du Toit-Neujmin-Delporte, 057P}}
[[Category:Comets]]
[[Category:Periodic comets]]
[[Category:Astronomical objects discovered in 1941]]
[[Category:Numbered comets|0057]]
[[Category:Split comets]]

[[Category:Comets in 2015]]
[[Category:Astronomical objects discovered in 1941|19410718]]


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{{comet-stub}}


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{{Comet-stub}}
[[eu:57P/du Toit-Neujmin-Delporte]]
[[fr:57P/du Toit-Neujmin-Delporte]]
[[it:57P/du Toit-Neujmin-Delporte]]
[[ja:デュトワ・ネウイミン・デルポルト彗星]]
[[pl:57P/du Toit-Neujmin-Delporte]]
[[ru:Комета дю Туа — Неуймина — Дельпорта]]
[[sk:57P/du Toit-Neujmin-Delporte]]
[[sl:Komet du Toit-Neujmin-Delporte]]

Latest revision as of 16:09, 24 December 2023

57P/du Toit–Neujmin–Delporte
Discovery
Discovered byDaniel du Toit,
Grigory N. Neujmin,
Eugène Joseph Delporte
Discovery dateJuly 18, 1941
Designations
1983 IX; 1983g;
1989 XIV; 1989l;
57P/1941 OE;
1941 VII; 1941e;
57P/1941 O1;
1941 VII; 1941e;
57P/1970 N2;
1970 XIII; 1970i;
57P/1983 RD6;
1983 IX; 1983g
Orbital characteristics
EpochJuly 25, 2002
(JD 2452480.5)
Aphelion5.176218 AU
Perihelion1.729511 AU
Semi-major axis3.452865 AU
Eccentricity0.499108
Orbital period6.42 yr
Inclination2.8447°
Last perihelionOctober 17, 2021[1][2][3]
May 22, 2015
Next perihelion2028-Mar-03[4]

57P/du Toit–Neujmin–Delporte is the designation of a periodic comet. It is a member of the Jupiter family of comets whose orbits and evolution are strongly influenced by the giant planet.[5] In 2002 it was discovered to have broken up into at least 20 fragments.[6] At the time of their discovery, these shed fragments were spread out along the orbital path subtending an angle of 27 arcminutes from the comet's surviving head.[7]

Discovery[edit]

The comet has many co-discoverers and a complicated discovery history due to unreliable communications during World War II. Daniel du Toit discovered the comet (retrospectively designated as P/1941 O1) on July 18, 1941, working at Boyden Station, South Africa. His cabled message about the comet did not reach his employer, Harvard College Observatory, until July 27. During a routine asteroid search, Grigory N. Neujmin (Simeis Observatory, Soviet Union) found the comet on a photographic plate exposed July 25. He confirmed his own observation on July 29, but the radiogram from Moscow took 20 days to reach Harvard. The official announcement of the new comet finally happened on August 20, 1941. A few days later, it became known that Eugène Joseph Delporte at the Royal Observatory, Belgium, also had found the comet on August 19, so he was added to the list of discoverers.

A few weeks later, news from Paul Ahnert at Sonneberg, Thuringia, Germany, reached Harvard that he also observed the new comet on July 22, but it was too late to recognize his contribution.

Fragment A was last observed in 2002.[8]

References[edit]

  1. ^ Seiichi Yoshida (2010-03-24). "57P/du Toit-Neujmin-Delporte". Seiichi Yoshida's Comet Catalog. Retrieved 2012-02-18.
  2. ^ Patrick Rocher (2009-11-24). "Note number : 0040 P/Du Toit-Neujmin-Delporte : 57P". Institut de mécanique céleste et de calcul des éphémérides [fr]. Retrieved 2012-02-19.
  3. ^ 57P past, present and future orbital elements (Kazuo Kinoshita)
  4. ^ "Horizons Batch for 57P/duToit-Neujmin-Delporte (90000632) on 2028-Mar-03" (Perihelion occurs when rdot flips from negative to positive). JPL Horizons. Archived from the original on 2022-06-18. Retrieved 2023-02-11. (JPL#K213/30 Soln.date: 2023-Apr-28)
  5. ^ Fernández, J. A.; et al. (December 1999). "The population, magnitudes, and sizes of Jupiter family comets". Astronomy and Astrophysics. 352: 327–340. Bibcode:1999A&A...352..327F.
  6. ^ "Spectacular Comet Breakup". Newsletter from the Institute for Astronomy, University of Hawaii (No.5 - Summer 2002). 2002. Archived from the original on 2014-10-30. Retrieved 2011-08-29.
  7. ^ Fernández, Yanga R. (August 2009). "That's the way the comet crumbles: Splitting Jupiter-family comets". Planetary and Space Science. 57 (10): 1218–1227. arXiv:0907.4806. Bibcode:2009P&SS...57.1218F. doi:10.1016/j.pss.2009.01.003. S2CID 15153026.
  8. ^ "JPL Small-Body Database Browser: 57P/duToit-Neujmin-Delporte-A" (last observation: 2002-12-06). Jet Propulsion Laboratory. Retrieved 2020-07-04.

External links[edit]


Numbered comets
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58P/Jackson–Neujmin


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