152P/Helin–Lawrence
{{Short description|Periodic comet with 9 year orbit}}
{{Infobox comet
| name=152P/Helin-Lawrence
| image=
| discoverer=Eleanor F. Helin
Kenneth J. Lawrence
| discovery_date=May 17, 1993
| designations=1993 XI; 2001 Y1
| epoch=March 6, 2006
| semimajor=4.496 AU
| perihelion=3.108 AU
| aphelion=5.884 AU
| eccentricity=0.3087
| period=9.534 a
| inclination= 9.8707°
| last_p=January 13, 2022
July 9, 2012
December 22, 2002
}}
152P/Helin–Lawrence is a periodic comet in the Solar System.
The comet came to perihelion on 9 July 2012, and reached about apparent magnitude 17.
References
{{reflist
| refs =
|date=2011-02-06
|title=152P/Helin-Lawrence (NK 2031)
|publisher=OAA Computing and Minor Planet Sections
|author=Syuichi Nakano
|author-link=Syuichi Nakano
|url=http://www.oaa.gr.jp/~oaacs/nk/nk2031.htm
|accessdate=2012-02-25}}
|date=2011-09-03
|title=152P/Helin-Lawrence (2012)
|publisher=Seiichi Yoshida's Comet Catalog
|author=Seiichi Yoshida
|url=http://www.aerith.net/comet/catalog/0152P/2012.html
|accessdate=2012-02-25}}
|title=152P/Helin-Lawrence Orbit
|url=http://www.minorplanetcenter.net/db_search/show_object?object_id=152P
|publisher=Minor Planet Center
|accessdate=2014-06-18}}
|title=Horizons Batch for 152P/Helin-Lawrence on 2031-Jul-09
|publisher=JPL Horizons
|type=Perihelion occurs when rdot flips from negative to positive
|url=https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%27152P%27&START_TIME=%272031-Jul-06%27&STOP_TIME=%272031-Jul-12%27&STEP_SIZE=%273%20hours%27&QUANTITIES=%2719%27
|accessdate=2022-06-22}} (JPL#72 Soln.date: 2022-Jun-20)
}}
External links
- [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=152P;orb=1 Orbital simulation] from JPL (Java) / [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=152P Horizons Ephemeris]
- [http://www.aerith.net/comet/catalog/0152P/index.html 152P/Helin-Lawrence] – Seiichi Yoshida @ aerith.net
- [https://web.archive.org/web/20160304084932/http://scully.cfa.harvard.edu/cgi-bin/returnprepeph.cgi?d=c&o=0152P Elements and Ephemeris for 152P/Helin-Lawrence] – Minor Planet Center
- [http://cometography.com/pcomets/152p.html 152P at Kronk's Cometography]
{{PeriodicComets Navigator|151P/Helin|153P/Ikeya-Zhang}}
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