54598 Bienor

54598 Bienor
Discovery
Discovered by	DES
Discovery site	Cerro Tololo Obs.
Discovery date	27 August 2000
Designations
MPC designation	(54598) Bienor
Pronunciation	/baɪˈiːnɔːr/
Named after	Biēnor
Alternative designations	2000 QC243
Minor planet category	Centaur
Adjectives	Bienorian /baɪ.ɪˈnɔːriən/
Symbol	(astrological)
Orbital characteristics
	Epoch 31 May 2020 (JD 2459000.5)
	Uncertainty parameter 0
Observation arc	24775 days (67.83 yr)
Aphelion	19.715 AU (2.9493 Tm)
Perihelion	13.172 AU (1.9705 Tm)
Semi-major axis	16.444 AU (2.4600 Tm)
Eccentricity	0.19894
Orbital period (sidereal)	66.68 yr (24355 d)
Average orbital speed	7.26 km/s
Mean anomaly	318.473°
Mean motion	0° 0m 53.039s / day
Inclination	20.745°
Longitude of ascending node	337.728°
Argument of perihelion	153.374°
Earth MOID	12.199 AU (1.8249 Tm)
Jupiter MOID	7.873 AU (1.1778 Tm)
TJupiter	3.575
Physical characteristics
Mean diameter	187.5±15.5 km; 198 km; 207±30 km
Sidereal rotation period	9.14 h (0.381 d)
Geometric albedo	0.03–0.05; 0.05±0.019
Temperature	~ 69 K
Spectral type	BR; B–V = 0.711±0.059; V–R = 0.476±0.046
Apparent magnitude	~ 19.2
Absolute magnitude (H)	7.5

54598 Bienor /baɪˈiːnɔːr/ is a centaur that grazes the orbit of Uranus. It is named after the mythological centaur Bienor. Its closest approach to the Sun (perihelion) is 13.2 AU.^[2] As of 2020^[update], Bienor is 14.2 AU from the Sun^[7] and will reach perihelion in January 2028.^[2] It measured approximately 198 kilometers (120 miles) in diameter.^[4]

References

^ Noah Webster (1884) A Practical Dictionary of the English Language
^ ^a ^b ^c ^d ^e ^f "JPL Small-Body Database Browser: 54598 Bienor (2000 QC243)" (2020-11-11 last obs). Jet Propulsion Laboratory. Retrieved 20 December 2020.
^ ^a ^b Bauer, J. M.; Grav, T.; Blauvelt, E.; Mainzer, A. K. (August 2013). "Centaurs and Scattered Disk Objects in the Thermal Infrared: Analysis of WISE/NEOWISE Observations". The Astrophysical Journal. 773 (1): 11. arXiv:1306.1862. Bibcode:2013ApJ...773...22B. doi:10.1088/0004-637X/773/1/22. S2CID 51139703.
^ ^a ^b ^c Johnston, Wm. Robert (18 August 2020). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 12 August 2021.
^ ^a ^b Stansberry, J.; Grundy, W.; Brown, M.; et al. (2008). "Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope". In Barucci, M. Antonietta (ed.). The Solar System Beyond Neptune. arXiv:astro-ph/0702538.
^ ^a ^b Hainaut, O. R.; Boehnhardt, H.; Protopapa, S. (October 2012). "Colours of minor bodies in the outer solar system. II. A statistical analysis revisited". Astronomy and Astrophysics. 546: 20. arXiv:1209.1896. Bibcode:2012A&A...546A.115H. doi:10.1051/0004-6361/201219566. S2CID 54776793. Retrieved 26 September 2019.
^ ^a ^b "AstDyS (54598) Bienor Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 20 December 2020.