Asteroids with Satellites Database--Johnston's Archive

(2500) Alascattalo

compiled by Wm. Robert Johnston
last updated 14 June 2020

--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: 2.2402954592 AU
orbital period P: 3.3531883447 yr
(= 1224.7751742 d)
eccentricity e: 0.098669163
perihelion distance q: 2.019247382 AU
aphelion distance Q: 2.4613435364 AU
inclination i: 6.9892326°
argument of perihelion ω: 160.78865°
ascending node Ω: 47.997935°
mean anomaly M: 12.477824°
perihelion passage TP: 2020 Apr 18.548529
Epoch: 2020 May 31
data arc: 1926-2020 (2249 obs.)
Earth MOID: 1.01474 AU
Jupiter Tisserand invariant TJ: 3.619


orbital data, secondary:
semimajor axis as: 57 km [*E]
separation/primary radius as/rp:17 [*E]
separation/Hill radius as/rH:0.051 [*E]
orbital period Ps: 7.04 d []
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 12.6 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 7.48 ± 0.13 km [M**]
geometric albedo: 0.257 ± 0.013 [M**]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 1100 km [*E]

other data, primary:
diameter dp: 6.9 km [*D]
rotation period RPp: 2.751 h [JPL]
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: 2.8 km [*D]
diameter ratio ds/dp: 0.4 [*D]
component mag. difference ΔM: 2.0 [*D]
rotation period RPs: ?

-- (2500) Alascattalo --discovery and notes:

Primary discovered 1926 Apr 02 from Heidelberg, Germany by K. Reinmuth. Alternate designation(s): 1926 GC, 1927 TA, 1946 FB, 1981 VD. Permanent number assigned 1981 Dec 11.

Named 1991 Nov 21 for the Alaskan mythical beast [MPC019332].

Companion discovered 2020 Mar 24 by P. Pravec, et al. using lightcurve observations from Italy; Serbia; Australia; Czech Rep.; Spain. Announced 2020 Jun 07.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2020 by Wm. Robert Johnston.
Last modified 14 June 2020.
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