Asteroids with Satellites Database--Johnston's Archive

(97034) 1999 UK7

compiled by Wm. Robert Johnston
last updated 19 March 2023

--Orbital and physical data--

(See this page for definitions of quantities; source codes in brackets, see this 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 axis a: 1.8528585535 AU
orbital period P: 2.52215401 yr
(= 921.2167522 d)
eccentricity e: 0.268032791
perihelion distance q: 1.356231704 AU
aphelion distance Q: 2.349485403 AU
inclination i: 24.1880367°
argument of perihelion ω: 202.3960167°
ascending node Ω: 336.8863342°
mean anomaly M: 349.6714287°
perihelion passage TP: 2023 Mar 23.430147
Epoch: 2023 Feb 25
data arc: 1999-2023 (1976 obs.)
Earth MOID: 0.379435 AU
Jupiter Tisserand invariant TJ: 3.857

orbital data, secondary:
semimajor axis as: 5.6 km [*E]
separation/primary radius as/rp:3.3 [*E]
separation/Hill radius as/rH:0.016 [*E]
orbital period Ps: 0.6488 ± 0.0012 d [B23h]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 14.87 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 3.50 km [*E]
geometric albedo: (0.16 ) [*A]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 360 km [*E]

other data, primary:
diameter dp: 3.41 km [*E]
rotation period RPp: 2.3757 ± 0.0005 h [B23h]
amplitude in mag., rotational ΔM: 0.06 [B23h]
amplitude in mag., mutual events ΔM:0.06 [B23h]
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: >0.82 km [*E]
diameter ratio ds/dp: >0.24 [B23h]
component mag. difference ΔM: <3.1 [*D]
rotation period RPs: ?

-- (97034) 1999 UK7 --discovery and notes:

Primary discovered 1999 Oct 30 from Socorro, New Mexico, USA by LINEAR Program. Alternate designation(s): 2001 OZ20. Linked to prediscovery observations from 1999 Sep 28. Permanent number assigned 2005 Feb 24.

Companion discovered 2023 Feb 15 by V. Benishek, P. Pravec, A. Marchini, and R. Papini using lightcurve observations from Sopot Observatory, Serbia; Astronomical Observatory of the University of Siena, Italy. Announced 2023 Mar 12 [B23h].

--Links, more technical:

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--Links to ADS abstracts:

© 2023 by Wm. Robert Johnston.
Last modified 19 March 2023.
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