Asteroids with Satellites Database--Johnston's Archive

(17700) 1997 GM40

compiled by Wm. Robert Johnston
last updated 23 September 2018

--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: 2.3212726739 AU
orbital period P: 3.5366268386 yr
(= 1291.7773496 d)
eccentricity e: 0.191902273
perihelion distance q: 1.875815172 AU
aphelion distance Q: 2.766730175 AU
inclination i: 8.4899933°
argument of perihelion ω: 55.403533°
ascending node Ω: 66.116115°
mean anomaly M: 38.859861°
perihelion passage TP: 2017 Nov 03.560309
Epoch: 2018 Mar 23
data arc: 1953-2018 (1447 obs.)
Earth MOID: 0.905931 AU
Jupiter Tisserand invariant TJ: 3.538

orbital data, secondary:
semimajor axis as: 5.4 km [*E]
separation/primary radius as/rp:3.3 [*D]
separation/Hill radius as/rH:0.011 [*D]
orbital period Ps: 0.6454 ± 0.0008 d [P18a]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 14.1 [MPC]
slope parameter G: 0.35 [P18a]
effective diameter dE: 3.45 ± 0.12 km [M**]
geometric albedo: 0.41 ± 0.047 [M**]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 480 km [*E]

other data, primary:
diameter dp: 3.29 km [*D]
rotation period RPp: 3.8382 ± 0.0002 h [P18a]
amplitude in mag., rotational ΔM: 0.13 [P18a]
amplitude in mag., mutual events ΔM:0.2 [P18a]
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: >1.02 km [*D]
diameter ratio ds/dp: >0.31 [P18a]
component mag. difference ΔM: <2.5 [*D]
rotation period RPs: ?

-- (17700) 1997 GM40 --discovery and notes:

Primary discovered 1997 Apr 07 from La Silla by E. W. Elst. Alternate designation(s): 1953 XU1, 1999 VD53. Linked to prediscovery observations from 1953 Dec 07. Permanent number assigned 2000 Oct 13.

Companion discovered 2018 Mar 20 by D. Pray, P. Pravec, H. Kucakova, K. Hornoch, P. Kusnirak, J. Oey, V. Benishek, A. Aznar, and A. L. Comazzi using lightcurve observations from Sugarloaf Mountain Observatory, South Deerfield, MA; Ondrejov Observatory; Blue Mountain Observatory; Sopot Observatory, Serbia; Sierra Nevada Observatory. Announced 2018 May 31 [P18a].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2018 by Wm. Robert Johnston.
Last modified 23 September 2018.
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