54598 Bienor

54598 Bienor
Discovery
Discovered byDES
Discovery siteCerro Tololo Obs.
Discovery date27 August 2000
Designations
(54598) Bienor
Pronunciation/baɪˈiːnɔːr/[1]
Named after
Biēnor
2000 QC243
Centaur [2]
AdjectivesBienorian /baɪ.ɪˈnɔːriən/
Symbol (astrological)
Orbital characteristics [2]
Epoch 31 May 2020 (JD 2459000.5)
Uncertainty parameter 0
Observation arc24775 days (67.83 yr)
Aphelion19.715 AU (2.9493 Tm)
Perihelion13.172 AU (1.9705 Tm)
Semi-major axis
16.444 AU (2.4600 Tm)
Eccentricity0.19894
66.68 yr (24355 d)
Average orbital speed
7.26 km/s
318.473°
0° 0m 53.039s / day
Inclination20.745°
337.728°
Argument of perihelion
153.374°
Earth MOID12.199 AU (1.8249 Tm)
Jupiter MOID7.873 AU (1.1778 Tm)
TJupiter3.575
Physical characteristics
Dimensionsa,b,c=127±5, 55±4, 45±4 km[3]
Mean diameter
187.5±15.5 km[4]
198 km[5]
207±30 km[6]
9.1736 ± 0.0002 h [3]
9.14 h (0.381 d)[2]
0.03–0.05[6]
0.05±0.019[4] 0.065±0.005 [3]
Temperature~ 69 K
BR[5]
B–V = 0.711±0.059[7]
V–R = 0.476±0.046[7]
~ 19.2[8]
7.5[2]

    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, Bienor is 14.2 AU from the Sun[8] and will reach perihelion in January 2028.[2] It measured approximately 198 kilometers (120 miles) in diameter.[5] Through the analysis of rotational light curves and stellar occultations, it has been determined that the object has a highly elongated ellipsoidal shape. Its light curve is consistent with surface deformations, regions with significant albedo variations, or even the possible presence of a moon.[3]

    See also

    References

    1. ↑ Noah Webster (1884) A Practical Dictionary of the English Language
    2. 1 2 3 4 5 6 "JPL Small-Body Database Browser: 54598 Bienor (2000 QC243)" (2020-11-11 last obs). Jet Propulsion Laboratory. Retrieved 20 December 2020.
    3. 1 2 3 4 Rizos, J. L.; Fernández-Valenzuela, E.; Ortiz, J. L.; Rommel, F. L.; Sicardy, B.; Morales, N.; Santos-Sanz, P.; Leiva, R.; Vara-Lubiano, M.; Morales, R.; Kretlow, M.; Alvarez-Candal, A.; Holler, B. J.; Duffard, R.; Gómez-Limón, J. M. (1 September 2024). "A study of centaur (54598) Bienor from multiple stellar occultations and rotational light curves". Astronomy & Astrophysics. 689: A82. arXiv:2405.17235. Bibcode:2024A&A...689A..82R. doi:10.1051/0004-6361/202450833. ISSN 0004-6361.
    4. 1 2 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.
    5. 1 2 3 Johnston, Wm. Robert (18 August 2020). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 12 August 2021.
    6. 1 2 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.
    7. 1 2 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.
    8. 1 2 "AstDyS (54598) Bienor Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 20 December 2020.


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