(15788) 1993 SB

(15788) 1993 SB is a trans-Neptunian object of the plutino class. Apart from Pluto, it was one of the first such objects discovered (beaten by two days by (385185) 1993 RO and by one day by 1993 RP), and the first to have an orbit calculated well enough to receive a number.[2] The discovery was made in 1993 at the La Palma Observatory with the Isaac Newton Telescope. Very little is known about the object. Even the diameter estimate of ~130 km is based on an assumed albedo of 0.09.[5]

(15788) 1993 SB
Orbit of (15788) 1993 SB1, planets (red) and the Sun (black). The outermost planet visible is Neptune.
Discovery[1]
Discovered byIwan P. Williams,
Alan Fitzsimmons, and
Donal O'Ceallaigh
La Palma (950)
Discovery date16 September 1993
Designations
none
Plutino[2][3]
Orbital characteristics[4]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 4
Observation arc5182 days (14.19 yr)
Aphelion51.860 AU (7.7581 Tm)
Perihelion26.727 AU (3.9983 Tm)
39.294 AU (5.8783 Tm)
Eccentricity0.31981
246.32 yr (89967.0 d)
4.64 km/s
349.75°
0° 0m 14.405s / day
Inclination1.9398°
354.93°
79.441°
Earth MOID25.7421 AU (3.85096 Tm)
Jupiter MOID21.655 AU (3.2395 Tm)
TJupiter5.337
Physical characteristics
Dimensions130 km
Mass~2×1018 kg
0.09
7.9

    KBO's found in 1993 include: (15788) 1993 SB, (15789) 1993 SC, (181708) 1993 FW, and (385185) 1993 RO.

    Over one thousand bodies were found in a belt between orbiting between about 30-50 AU from the Sun in the twenty years (1992-2012), after finding 1992 QB1 (named in 2018, 15760 Albion), showing a vast belt of bodies more than just Pluto and Albion.[6][7] By 2018, over 2000 Kuiper belts objects were discovered.[7]

    References
    1. "MPEC 1993-S09: 1993 SB". IAU Minor Planet Center. 1993-09-22. Retrieved 2010-02-20.
    2. "MPEC 2010-B62 :Distant Minor Planets (2010 FEB. 13.0 TT)". Minor Planet Center. 2010-01-30. Retrieved 2010-02-20.
    3. Marc W. Buie. "Orbit Fit and Astrometric record for 15788" (1999-11-10 using 45 of 50 observations). SwRI (Space Science Department). Retrieved 2010-02-20.
    4. "15788 (1993 SB)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 8 April 2016.
    5. Wm. Robert Johnston. "List of Known Trans-Neptunian Objects". Johnston's Archive. Archived from the original on 24 November 2005. Retrieved 2006-02-07.
    6. "The Kuiper Belt at 20". Astrobiology Magazine. 2012-09-01. Retrieved 2019-12-01.
    7. Dyches, By Preston. "10 Things to Know About the Kuiper Belt". NASA Solar System Exploration. Retrieved 2019-12-01.


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