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19P/Borrelly

Periodic comet

Field	Value
name	19P/Borrelly
image	Comet Borrelly Nucleus.jpg
caption	The nucleus of Comet Borrelly as seen by NASA's Deep Space 1 mission in 22 September 2001.
discoverer	Alphonse Borrelly
discovery_site	Marseille, France
discovery_date	28 December 1904
mpc_name	P/1904 Y2, P/1911 S1
designations
orbit_ref
epoch	9 August 2022 (JD 2459800.5)
perihelion	1.306 AU
aphelion	5.90 AU
semimajor	3.61 AU
eccentricity	0.6377
period	6.85 years
inclination	29.30°
Earth_moid	0.36 AU
physical_ref
dimensions	8.0 xx
density
albedo	0.022
mass	2 kg
M1	9.8
M2	13.2
last_p	1 February 2022
next_p	11 December 2028

Epoch	Perihelion
(AU)
2028	1.310
2022	1.306
2015	1.349
2008	1.355

Comet Borrelly or Borrelly's Comet (official designation: 19P/Borrelly) is a comet with a period of 6.85 years that was visited by the Deep Space 1 spacecraft in 2001. The comet last came to perihelion (closest approach to the Sun) on 1 February 2022 and will next come to perihelion on 11 December 2028.

Date & time of
closest approach	Earth distance
(AU)	Sun distance
(AU)	Velocity
wrt Earth
(km/s)	Velocity
wrt Sun
(km/s)	Uncertainty
region
([3-sigma](3-sigma))	Reference
2028-Dec-05 19:12 ± 6 min	0.413 AU	1.31 AU	17.3	33.3	± 35 thousand km	[Horizons](https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%27DES%3D19P%3BCAP%27&START_TIME=%272028-Dec-05%2019:12%27&STOP_TIME=%272028-Dec-06%27&STEP_SIZE=%271%20day%27&QUANTITIES=%2719,20,22,39%27)

Deep Space 1 returned images of the comet's nucleus from 3400 kilometers away. At 45 meters per pixel, it was the highest resolution view ever seen of a comet up until that time.

Discovery

The comet was discovered by Alphonse Borrelly during a routine search for comets at Marseille, France on December 28, 1904.

Exploration

Deep Space 1 flyby

On September 21, 2001 the spacecraft Deep Space 1, which was launched to test new equipment in space, performed a flyby of Borrelly. It was steered toward the comet during the extended mission of the craft, and presented an unexpected bonus for the mission scientists. Despite the failure of a system that helped determine its orientation, Deep Space 1 managed to send back to Earth what were, at the time, the best images and other science data from a comet.

Notes

References

|archive-url=https://web.archive.org/web/20230211125953/https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%2790000304%27&START_TIME=%272028-Dec-11%2021:00%27&STOP_TIME=%272028-Dec-12%27&STEP_SIZE=%2710%20minutes%27&QUANTITIES=%2719%27 |archive-date=2023-02-11 |url-status=live

| access-date= 2025-12-20 }}

|access-date=2008-12-16| archive-url= https://web.archive.org/web/20090122074028/http://www.space.com/scienceastronomy/solarsystem/borrelly_dark_011129.html| archive-date= 22 January 2009 | url-status= dead}}

| doi-access= free }}

|access-date=2022-06-15}}

References

{{mpc. 19p
(25 June 2004). "Meet Comet Borrelly".

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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