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167P/CINEOS

Chiron-type comet

Field	Value
name	167P/CINEOS
discoverer	CINEOS
discovery_date	August 10, 2004
designations
orbit_ref
epoch	2066-03-11
observation_arc	9.35 years
semimajor	16.28 AU
perihelion	11.77 AU
(outside Saturn's orbit)
aphelion	20.8 AU
eccentricity	0.27705
inclination	19.0529°
max_speed	9.8 km/s
min_speed	5.6 km/s (2033-Nov-30)
period	65.67 yr
tjup	3.527
physical_ref
dimensions
albedo
spectral_type	{{unbulleted
(B–V) {{	}}
(V–R) {{	}}
(R–I) {{	}}
(B–R) {{	}} }}
M2	9.7
last_p	April 24, 2001
next_p	March 22, 2066

(outside Saturn's orbit) (B–V) | (V–R) | (R–I) | (B–R) }}

167P/CINEOS, also known as ****, is a large periodic comet and active, grey centaur, approximately 66 km in diameter, orbiting the Sun outside the orbit of Saturn. It was discovered on August 10, 2004, by astronomers with the CINEOS survey at Gran Sasso in Italy. It is one of only a handful known Chiron-type comets.

The comet nucleus (~66 km) is roughly half the size of (Bernardinelli–Bernstein) and it has a similar perihelion point just outside the orbit of Saturn.

Comet	Nucleus
diameter	Perihelion
(Sun approach)	Perihelion
velocity
[95P/Chiron](95p-chiron)	215 km	8.5 AU	12.0 km/s
C/2014 UN271 (Bernardinelli–Bernstein)	120 km	10.95 AU	12.7 km/s
167P/CINEOS	66 km	11.77 AU	9.8 km/s

Description

Due to its high Jupiter tisserand of 3.5, and a semi-major axis larger than that of Jupiter, 167P/CINEOS is classified as a Chiron-type comet, named after the groups namesake, 2060 Chiron or 95P/Chiron, designated as both minor planet and comet.

167P/CINEOS was first reported as a minor planet, designated , but was found to have a very faint asymmetric cometary coma. Contrary to Chiron, which is the prototype object for the dynamical group of centaurs, 167P/CINEOS has no "dual status" as comet and minor planet, and demonstrates the inconsistencies in applying the current rules for designating small Solar System bodies. 167P/CINEOS not only has orbital parameters similar to those of Chiron, but also a low B–R magnitude of , which places it into the group grey centaurs.

In June 2039, 167P/CINEOS will pass 1.64 AU from Uranus.

References

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|archive-url=https://web.archive.org/web/20220624114237/https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%27167P%27&START_TIME=%272066-Mar-17%27&STOP_TIME=%272066-Mar-21%27&STEP_SIZE=%271%20hours%27&QUANTITIES=%2719%27 |archive-date=2022-06-24 |url-status=live

Info: Wikipedia Source

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