Asteroids with Satellites Database--Johnston's Archive

(1626) Sadeya

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: 2.3643270258 AU
orbital period P: 3.6354763167 yr
(= 1327.8828034 d)
eccentricity e: 0.272979485
perihelion distance q: 1.718914252 AU
aphelion distance Q: 3.0097398001 AU
inclination i: 25.3121397°
argument of perihelion ω: 149.233004°
ascending node Ω: 279.483869°
mean anomaly M: 281.6619921°
perihelion passage TP: 2021 Mar 15.954704
Epoch: 2021 Jul 01
data arc: 1927-2020 (2686 obs.)
Earth MOID: 0.76304 AU
Jupiter Tisserand invariant TJ: 3.373


orbital data, secondary:
semimajor axis as: 54 km [*E]
separation/primary radius as/rp:7.4 [*E]
separation/Hill radius as/rH:0.027 [*E]
orbital period Ps: 2.138 ± 0.008 d [B20d]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 11.2 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 15.14 ± 0.49 km [M**]
geometric albedo: 0.486 ± 0.067 [M**]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 2000 km [*E]

other data, primary:
diameter dp: 14.65 ± 0.48 km [*D]
rotation period RPp: 3.4202 ± 0.0002 h [B20d]
amplitude in mag., rotational ΔM: 0.16 [B20d]
amplitude in mag., mutual events ΔM:0.085 ±0.015 [B20d]
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: 3.81 ± 0.32 km [*D]
diameter ratio ds/dp: 0.26 ± 0.02 [B20d]
component mag. difference ΔM: 2.93 ± 0.17 [*D]
rotation period RPs: ?

-- (1626) Sadeya --discovery and notes:

Primary discovered 1927 Jan 10 from Barcelona, Spain by J. Comas Sola. Alternate designation(s): 1927 AA, 1956 AA. Permanent number assigned -.

Named 1964 Jan 30 for the Sociedad Astronomica de Espana y America [MPC002277].

Companion discovered 2020 Aug 01 by Benishek, V., P. Pravec, A. Marchini, R. Papini, F. Salvaggio, V. Chiorny, and M. Husarik using lightcurve observations from Sopot Observatory, Serbia; Astronomical Observatory of the University of Siena; Chuguev Station, Kharkiv Observatory, Ukraine; Skalnate Pleso Observatory. Announced 2020 Dec 01 [B20d].

--Links, more technical:

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--Links to ADS abstracts:


© 2020, 2021 by Wm. Robert Johnston.
Last modified 25 September 2021.
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