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

| next_p=2031-Jul-09

}}

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 =

{{cite web

|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}}

{{cite web

|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}}

{{cite web

|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}}

{{cite web

|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)

}}