(278361) 2007 JJ43

(7005278361000000000♠278361) 2007 JJ₄₃
Discovery^[1]
Discovered by	Palomar Observatory
Discovery date	14 May 2007
Designations
Alternative names	2007 JJ₄₃
Minor planet category	TNO Cubewano^[2]
Orbital characteristics^[1]^[3]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 3
Observation arc	3661 days (10.02 yr)
Aphelion	55.8274 AU (8.35166 Tm)
Perihelion	40.3918 AU (6.04253 Tm)
Semi-major axis	48.1096 AU (7.19709 Tm)
Eccentricity	0.16042
Orbital period	333.70 yr (121884 d)
Mean anomaly	338.058°
Mean motion	0° 0^m 10.633^s / day
Inclination	12.0622°
Longitude of ascending node	272.506°
Argument of perihelion	6.75208°
Earth MOID	39.374 AU (5.8903 Tm)
Jupiter MOID	35.1616 AU (5.26010 Tm)
Jupiter Tisserand parameter	5.978
Physical characteristics
Dimensions	7005670000000000000♠670±150 km^[4]
Rotation period	12.097 h^[4]
Apparent magnitude	20.8^[5]
Absolute magnitude (H)	3.2^[6] 3.9^[1]

(268361) 2007 JJ₄₃ is a trans-Neptunian object (TNO) orbiting the Sun near the outer edge of the Kuiper belt. Based on how bright it appears, it is a possible dwarf planet.

Its discovery images were taken in 2007, and its absolute magnitude of 4.4 is one of the twenty brightest exhibited by TNOs. Assuming it has a typical albedo, this would make it roughly the same size as Ixion (about 650–800 km diameter). Mike Brown's website lists it as a "highly likely" dwarf planet.^[7] Its diameter is 7005670000000000000♠670±150 km.^[4]

Observations by Brown in 2012, using the W. M. Keck Observatory, suggest that (278361) 2007 JJ₄₃ does not have a companion.^[8]

As of 2014, it is about 41.3 AU from the Sun.^[5]

References

1 2 3 "278361 (2007 JJ43)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 11 April 2016.
↑ Wm. Robert Johnston (20 August 2011). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 2012-02-03.
↑ AstDys 2007 JJ₄₃ Summary Retrieved: 2012-02-03
1 2 3 "Pushing the Limits of K2:Observing Trans-Neptunian Objects S3K2: Solar System Studies with K2" (PDF).
1 2 "AstDys 2007 JJ₄₃ Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 2012-02-03.
↑ A Southern Sky and Galactic Plane Survey for Bright Kuiper Belt Object
↑ Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Retrieved 2011-08-25.
↑ Plutokiller (2012-02-03). "2007 JJ43 doesn't have a big moon. There could be a small one hiding in there". Twitter. Retrieved 2012-02-03. (moonless)

Dwarf planets

Asteroid belt	IAU: Ceres No longer rounded and therefore not dwarf planets: Vesta (disrupted out of equilibrium)

Centaurs	Possibly: Chariklo Chiron

Centaurs (extended)	Possibly: 1995 SN55 Ceto 2010 TY53

Plutinos	IAU: Pluto Additional objects proposed by Brown and Tancredi: Orcus Ixion 2003 AZ₈₄ 2004 UX₁₀ Huya Possibly: 2003 UZ₄₁₃ 2003 VS₂ 2002 VR₁₂₈ 2004 PF₁₁₅ 2002 XV93 2007 JH43 2001 QF298

Twotinos	Possibly: 2002 WC₁₉

Other resonances/ unknown resonances:	IAU: Haumea Possibly: 2002 XW₉₃ 1999 DE₉ 1999 KR₁₆ 2001 YH₁₄₀ 2011 GM27 2010 VK201 2013 FZ27 2014 UM33 1999 CD158

Cubewanos:	IAU: Makemake Additional objects proposed by Brown and Tancredi: 2002 MS₄ Salacia Quaoar Varuna Varda 2004 GV₉ 2002 AW₁₉₇ 2002 TX₃₀₀ 2005 RR₄₃ 2003 OP₃₂ 2005 RN₄₃ Possibly: Chaos Altjira Sila-Nunam 2002 UX₂₅ 2007 JJ₄₃ 2005 UQ₅₁₃ 2004 TY₃₆₄ 2003 QW₉₀ 1998 SN₁₆₅ 2002 KX₁₄ Praamzius 2004 NT₃₃ 2010 FX86 2002 CY248 2010 VR11 Rhadamanthus

Scattered disc	IAU: Eris Additional objects proposed by Brown and Tancredi: 2007 OR₁₀ 1996 TL₆₆ 2001 UR₁₆₃ 2005 RM₄₃ Possibly: 2002 TC₃₀₂ 2004 XA₁₉₂ 2005 QU₁₈₂ 2006 QH181 2007 UK₁₂₆ 2010 EK139 2010 KZ39 2010 RE64 2010 RF43 2010 TJ 2013 FY27 2008 OG19 1996 GQ₂₁ 2012 HH₂ 1999 CC₁₅₈ 2006 HH123 2010 VZ98

Area uncertain	Captured satellites that were once dwarf planets: Triton (captured by Neptune) Phoebe (captured by Saturn, and was then disrupted out of equilibrium) Possibly: 2011 FW62 (lost) 2000 YW₁₃₄ V774104

Detached objects	Possibly: 2004 XR190 2010 GB174 2008 ST291 1995 TL₈ 2005 TB₁₉₀ 2003 QX113 2003 FY₁₂₈ 2004 VN112 2000 CR₁₀₅

Sednoids	Objects proposed by Brown and Tancredi: Sedna Possibly: 2012 VP113

Former candidates	Pallas Vesta Hygiea Cybele

See also: Charon Vanth Dysnomia Hiʻiaka Mesoplanet Planemo List of trans-Neptunian objects List of possible dwarf planets List of Solar System objects List of Solar System objects by size

Small Solar System bodies

Minor planets

Designation Groups Moons Meanings of names Pronunciation of names

Asteroids	Aten asteroid Families Jupiter Trojans Main-belt Near-Earth Spectral types

Distant minor planets	Centaurs Damocloids Neptune trojans Trans-Neptunian objects Detached Kuiper belt Oort cloud Scattered disc

Comets

Meteoroids

Lists / categories

Asteroid groups and families
Asteroid moons
Binary asteroids
Minor planets

External links

(278361) 2007 JJ43 at the JPL Small-Body Database

Discovery · Orbit diagram · Orbital elements · Physical parameters

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