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Asteroids with Satellites Database--Johnston's Archive

(100015) Sutcliffe

compiled by Wm. Robert Johnston
last updated29 September 2025

--Orbital and physical data--

(Seethis page for definitions of quantities; source codes in brackets, seethis link for full references; *A, *D, and *E indicate assumed, derived, and estimated values, respectively.)

dynamical type, primary:Mars crossing asteroid


orbital data, primary (osculating elements)[JPL]:

semimajor axisa:2.3651429031 AU
orbital periodP:3.637426961 yr
(= 1328.5701974 d)
eccentricitye:0.2992688022
perihelion distanceq:1.6573294194 AU
aphelion distanceQ:3.0729563868 AU
inclinationi:4.388231766°
argument of perihelionω:88.79579629°
ascending nodeΩ:269.24822865°
mean anomalyM:346.55046171°
perihelion passageTP:2026 Jan 09.6351548
Epoch:2025 Nov 21
data arc:1989-2025(1469 obs.)
Earth MOID:0.65977 AU
Jupiter Tisserand invariantTJ:3.483

orbital data, secondary:

semimajor axisas:3.5 km[*E]
separation/primary radiusas/rp:4.3 [*E]
separation/Hill radiusas/rH:0.015 [*E]
orbital periodPs:0.8604± 0.0004d [B18g]
eccentricityes:?
normalized ang. mom.αL:?
other data, system (combined):
absolute mag.H:15.92[MPC]
slope parameterG:(0.15) [*A]
effective diameterdE:1.71 km [*E]
geometric albedo:(0.26) [*A]
color indexU-B:?
color indexB-V:?
taxonomic type:
massm:?
densityρ:(2 g/cm3) [*A]
Hill radiusrH:230 km [*E]

other data, primary:

diameterdp:1.61 km [*E]
axial ratiosa/b, b/c:1.0, ? [*E]
rotation periodRPp:2.4172± 0.0002h [B18g]
amplitude in mag., rotationalΔM:0.05 [B18g]
amplitude in mag., mutual eventsΔM:0.17 ±0.04 [B18g]
pole directionΒ, λ:?,?

other data, secondary:

diameterds:0.56km [*E]
diameter ratiods/dp:0.35± 0.02 [B18g]
component mag. differenceΔM:2.28± 0.12 [*D]
rotation periodRPs:?

--(100015) Sutcliffe --discovery and notes:

Primary discovered1989 Sep 28from Palomar Observatory, California, USAby C. S. Shoemaker.Alternate designation(s):1989 SR7, 2000 UC98.Linked to prediscovery observations from 1989 Sep 27.Permanent number assigned 2005 Oct 19.

Named 2025 Nov 03 [WGSBN0525].

Companion discovered2018 Sep 09 by V. Benishek, P. Pravec, H. Kucakova, K. Hornoch, P. Kusnirak, J. Oey, R. Groom, A. Aznar, and A. Sotausinglightcurve observations from Sopot Observatory, Serbia; Ondrejov Observatory, Czech Republic; Blue Mountains Observatory, Leura, New South Wales, Australia; Darling Range Observatory, Western Australia, Australia; Sierra Nevada Observatory, Grenada, Spain.Announced2018 Oct 23 [B18g].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


©2018-2019, 2025by Wm. Robert Johnston.
Last modified3 November 2025.
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