Asteroids with Satellites Database--Johnston's Archive

(4528) Berg

compiled by Wm. Robert Johnston
last updated 22 May 2022

--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: main belt asteroid

orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 2.5509689784 AU
orbital period P: 4.074421625 yr
(= 1488.1824987 d)
eccentricity e: 0.136619064
perihelion distance q: 2.202457985 AU
aphelion distance Q: 2.8994799716 AU
inclination i: 8.7125166°
argument of perihelion ω: 316.287807°
ascending node Ω: 161.347138°
mean anomaly M: 26.506601°
perihelion passage TP: 2021 Oct 03.425943
Epoch: 2022 Jan 21
data arc: 1965-2022 (3202 obs.)
Earth MOID: 1.22717 AU
Jupiter Tisserand invariant TJ: 3.411

orbital data, secondary:
semimajor axis as: 26 km [*E]
separation/primary radius as/rp:5.8 [*E]
separation/Hill radius as/rH:0.017 [*E]
orbital period Ps: 1.4592 ± 0.0008 d [B22d]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 12.33 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 9.36 ± 0.12 km [M14c]
geometric albedo: 0.292 ± 0.043 [M14c]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 1500 km [*E]

other data, primary:
diameter dp: 8.97 ± 0.11 km [*D]
rotation period RPp: 3.5627 ± 0.0001 h [B22d]
amplitude in mag., rotational ΔM: 0.23 [B22d]
amplitude in mag., mutual events ΔM:0.09 ±0.03 [B22d]
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: >2.69 ± 0.03 km [*D]
diameter ratio ds/dp: >0.3 [B22d]
component mag. difference ΔM: <2.6 [*D]
rotation period RPs: ?

-- (4528) Berg --discovery and notes:

Primary discovered 1983 Aug 13 from Flagstaff, Arizona, USA by E. Bowell. Alternate designation(s): 1983 PP, 1978 NB4, 1979 SU3, 1981 DX3, 1988 VF7. Linked to prediscovery observations from 1965 Feb 28. Permanent number assigned 1990 Jul 08.

Named 1990 Sep 05 [MPC016886].

Companion discovered 2022 Feb 02 by V. Benishek, P. Pravec, G. Scarfi, A. Coffano, W. Marinello, G. Pizzetti, A. Soffiantini, A. Marchini, R. Papini, P. Bacci, M. Maestripieri, R. Bacci, L. Franco, R. Durkee, R. Goncalves, N. Montigiani, M. Mannucci, G. Baj, N. Ruocco using lightcurve observations from Sopot Observatory, Serbia; Iota Scorpii Observatory, La Spezia, Italy; Lumezzane Observatory, Italy; Astronomical Observatory of the University of Siena; San Marcello Pistoiese Observatory, Italy; Shed of Science South Observatory, Pontotoc, Texas, USA; Linhaceira Observatory, Tomar, Portugal; Osservatorio Astronomico Margherita Hack, Firenze, Italy; M57 Observatory, Saltrio, Italy; Osservatorio Astronomico Nastro Verde, Sorrento, Italy. Announced 2022 May 14 [B22d].

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--Links to ADS abstracts:

© 2022 by Wm. Robert Johnston.
Last modified 22 May 2022.
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