Asteroids with Satellites Database--Johnston's Archive

2013 FY27

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: TNO, scattered disk


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 58.9004 AU
orbital period P: 452.041 yr
(= 165111 d)
eccentricity e: 0.39364
perihelion distance q: 35.715 AU
aphelion distance Q: 82.09 AU
inclination i: 33.01929°
argument of perihelion ω: 138.7°
ascending node Ω: 187.1453°
mean anomaly M: 213.3°
perihelion passage TP: 2202 May 31
Epoch: 2018 Mar 23
data arc: 2013-2018 (19 obs.)
Earth MOID: 34.7719 AU
Jupiter Tisserand invariant TJ: 5.275
Neptune Tisserand invariant TN:2.668 [*D]


orbital data, secondary:
semimajor axis as: 9800 km (separation) [S18h]
orbital period Ps: 15 d [*E]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 3 [MPC]
3.15 ± 0.03 [S18h]
slope parameter G: (0.15) [*A]
effective diameter dE: 765 ± 80/85 km [S18h]
geometric albedo: 0.17 ± 0.045/0.03 [S18h]
color index U-B: ?
color index B-V: ?
color index V-R:0.56 ± 0.03 [S18h]
color index V-I:1.08 ± 0.05 [S18h]
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 3400000 km [*E]

other data, primary:
diameter dp: 740 ± 85/90 km [S18h]
rotation period RPp: ?
amplitude in mag., rotational ΔM: <0.06 [S18h]
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: 190 km [S18h]
diameter ratio ds/dp: 0.25 ± 0.03 [*D]
component mag. difference ΔM: 3 ± 0.2 [S18h]
rotation period RPs: ?

-- 2013 FY27 --discovery and notes:

Primary discovered 2013 Mar 17 from Cerro Tololo Observatory, La Serena, Chile by ?.

Companion discovered 2018 Jan 15 by S. S. Sheppard, Y. R. Fernandez, and A. Moullet using Hubble Space Telescope observations from Hubble Space Telescope. Announced 2018 Aug 10 [S18i].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


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