(15874) 1996 TL66

Last updated
(15874) 1996 TL66
Discovery [1]
Discovered by D. C. Jewitt
J. X. Luu
J. Chen
C. A. Trujillo
Discovery site Mauna Kea Obs.
Discovery date9 October 1996
Designations
(15874) 1996 TL66
1996 TL66
TNO [2]  · SDO [3]
distant [4]
Orbital characteristics [2]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 2
Observation arc 5883 days (16.11 yr)
Aphelion 131.75  AU (19.710  Tm)
Perihelion 35.057 AU (5.2445 Tm)
83.403 AU (12.4769 Tm)
Eccentricity 0.57967
761.70 yr (278211 d)
6.8505°
0° 0m 4.658s / day
Inclination 24.006°
217.82°
184.79°
Physical characteristics
339±20 km [5]
575±115 km [6]
12  h (0.50  d) [2]
0.110+0.021
−0.015 [5]
0.035+0.02
−0.01 [6]
B–V = 0.687±0.072 [7]
V–R = 0.369±0.052 [7]
21 [8]
5.4 [2]

    (15874) 1996 TL66 (provisional designation 1996 TL66) is a trans-Neptunian object of the scattered disc orbiting in the outermost region of the Solar System. [2] [3]

    Contents

    The Spitzer Space Telescope has estimated this object to be about 575 kilometres (357 mi) in diameter, [6] but 2012 estimates from the Herschel Space Observatory estimate the diameter as closer to 339 kilometres (211 mi). [5] It is not a detached object, since its perihelion (closest approach to the Sun) is under the influence of Neptune. [3] Light-curve-amplitude analysis suggests that it is a spheroid. [9]

    Discovery

    Discovered in 1996 by David C. Jewitt et al., it was the first object to be categorized as a scattered-disk object (SDO), although (48639) 1995 TL8 , discovered a year earlier, was later recognised as a scattered-disk object. It was considered one the largest known trans-Neptunian objects at the time of the discovery, being placed second after Pluto. [10] It came to perihelion in 2001. [2]

    Orbit and size

    1996 TL66's orbit 1996 TL66 orbit.gif
    1996 TL66's orbit

    1996 TL66 orbits the Sun with a semi-major axis of 83.9  AU [2] but is currently only 35 AU from the Sun with an apparent magnitude of 21. [8] In 2007, the Spitzer Space Telescope estimated it to have a low albedo with a diameter of about 575±115 km. [6] More-recent measurements in 2012 by the 'TNOs are Cool' research project and reanalysis of older data have resulted in a new estimate of these figures. [5] It is now assumed that it has a higher albedo and the diameter was revised downward to 339±20 km. Light-curve-amplitude analysis shows only small deviations, suggesting 1996 TL66 has a spheroidal shape with small albedo spots. [9]

    References

    1. ↑ "MPEC 1997-B18: 1996 TL66". Minor Planet Center. 1997-01-30. Retrieved 2011-07-05.
    2. 1 2 3 4 5 6 7 "JPL Small-Body Database Browser: 15874 (1996 TL66)" (2006-07-30 last obs). Retrieved 5 April 2016.
    3. 1 2 3 Marc W. Buie (2006-07-30). "Orbit Fit and Astrometric record for 15874". SwRI (Space Science Department). Retrieved 2009-01-22.
    4. ↑ "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. Retrieved 2009-01-22.
    5. 1 2 3 4 Santos-Sanz, P.; et al. (2012). ""TNOs are Cool": A Survey of the Transneptunian Region IV. Size/albedo characterization of 15 scattered disk and detached objects observed with Herschel Space Observatory-PACS". Astronomy & Astrophysics . 541: A92. arXiv: 1202.1481 . Bibcode:2012A&A...541A..92S. doi:10.1051/0004-6361/201118541. S2CID   118600525.
    6. 1 2 3 4 John Stansberry; Will Grundy; Mike Brown; Dale Cruikshank; John Spencer; David Trilling; et al. (2007). "Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope". 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.
    8. 1 2 "AstDys (15874) 1996TL66 Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 2010-02-10.
    9. 1 2 Tancredi, G., & Favre, S. (2008) Which are the dwarfs in the Solar System?. Depto. Astronomía, Fac. Ciencias, Montevideo, Uruguay; Observatorio Astronómico Los Molinos, MEC, Uruguay. Retrieved 10-08-2011
    10. ↑ "1996 TO66 – Another Large Transneptunian Object". Harvard-Smithsonian Center for Astrophysics. 19 June 1997. Retrieved 18 July 2020.


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