(308193) 2005 CB79

(308193) 2005 CB₇₉ is a trans-Neptunian object that is a member of the Haumea family.^[9]

(308193) 2005 CB₇₉

(308193) 2005 CB79 among other Haumea family objects
Discovery[1]
Discovered by	M. E. Brown, C. A. Trujillo, D. L. Rabinowitz
Discovery date	6 February 2005
Designations
MPC designation	2005 CB79
Minor planet category	Cubewano (MPC)[2] Extended (DES)[3]
Orbital characteristics[4]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 4
Observation arc	5083 days (13.92 yr)
Aphelion	50.062 AU (7.4892 Tm) (Q)
Perihelion	37.231 AU (5.5697 Tm) (q)
Semi-major axis	43.647 AU (6.5295 Tm) (a)
Eccentricity	0.14698 (e)
Orbital period (sidereal)	288.36 yr (105324 d)
Mean anomaly	319.66° (M)
Mean motion	0° 0m 12.305s / day (n)
Inclination	28.606° (i)
Longitude of ascending node	112.79° (Ω)
Time of perihelion	≈ 5 December 2048[5] ±3 days
Argument of perihelion	90.154° (ω)
Physical characteristics
Dimensions	158 km[6][7]
Synodic rotation period	6.76 h (0.282 d)
Sidereal rotation period	13.52 h[8]
Geometric albedo	0.7 (assumed)
Spectral type	(Neutral) B-V=0.73, V-R=0.37[9]
Apparent magnitude	21.1[10]
Absolute magnitude (H)	4.6[4]

Haumea family

As a member of the Haumea family, (308193) 2005 CB₇₉ is suspected of being an icy mantle collisional fragment from dwarf planet Haumea. With an absolute magnitude (H) of 4.7,^[4] and a Haumea-family albedo of 0.7, this object would have a diameter of 158 km.^[7]

Observations by Mike Brown in 2012 using the W. M. Keck Observatory suggest that (308193) 2005 CB₇₉ does not have a companion.^[11]

The + marks 2005 RR₄₃ (B-V=0.77, V-R=0.41) on this color plot of TNOs. All the other Haumea-family members (2005 CB₇₉: 0.73, 0.37) are located to the lower left of this point.