Asteroids with Satellites Database--Johnston's Archive

(5772) Johnlambert

compiled by Wm. Robert Johnston
last updated 25 September 2021

--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: 2.5551683175 AU
orbital period P: 4.0844094352 yr
(= 1491.8587218 d)
eccentricity e: 0.128357743
perihelion distance q: 2.227192678 AU
aphelion distance Q: 2.883143957 AU
inclination i: 12.23462757°
argument of perihelion ω: 8.1386707°
ascending node Ω: 275.2552603°
mean anomaly M: 15.3433957°
perihelion passage TP: 2021 Apr 28.416170
Epoch: 2021 Jul 01
data arc: 1955-2021 (2512 obs.)
Earth MOID: 1.21111 AU
Jupiter Tisserand invariant TJ: 3.395


orbital data, secondary:
semimajor axis as: 14 km [*E]
separation/primary radius as/rp:3.6 [*E]
separation/Hill radius as/rH:0.010 [*E]
orbital period Ps: 0.7492 ± 0.0004 d [B21e]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 13.07 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 8 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: 1400 km [*E]

other data, primary:
diameter dp: 7.81 km [*E]
rotation period RPp: 3.0782 ± 0.0002 h [B21e]
amplitude in mag., rotational ΔM: 0.17 [B21e]
amplitude in mag., mutual events ΔM:0.05 [B21e]
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: >1.72 km [*E]
diameter ratio ds/dp: >0.22 [B21e]
component mag. difference ΔM: <3.3 [*D]
rotation period RPs: ?

-- (5772) Johnlambert --discovery and notes:

Primary discovered 1988 Jun 15 from Palomar Observatory, California, USA by E. F. Helin. Alternate designation(s): 1988 LB, 1984 MA. Linked to prediscovery observations from 1955 Mar 24. Permanent number assigned 1993 Nov 29.

Named 2000 Jan 24 for John V. Lambert (1945-) [MPC039195].

Companion discovered 2021 Aug 08 by V. Benishek, P. Pravec using lightcurve observations from Sopot Observatory, Serbia. Announced 2021 Sep 19 [B21e].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2021 by Wm. Robert Johnston.
Last modified 25 September 2021.
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