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Asteroids with Satellites Database--Johnston's Archive

2017 YE5

compiled by Wm. Robert Johnston
last updated27 May 2019

--Orbital and physical data--

(Seethis page for definitions of quantities; source codes in brackets, seethis link for full references; *A, *D, and *E indicate assumed, derived, and estimated values, respectively.)

dynamical type, primary:NEA, Apollo(PHA)


orbital data, primary (osculating elements)[JPL]:

semimajor axisa:2.820305 AU
orbital periodP:4.736354 yr
(= 1729.985 d)
eccentricitye:0.7102765
perihelion distanceq:0.81710844 AU
aphelion distanceQ:4.823501 AU
inclinationi:6.209782°
argument of perihelionω:110.768344°
ascending nodeΩ:103.960299°
mean anomalyM:348.99482°
perihelion passageTP:2018 May 14.885575
Epoch:2018 Mar 23
data arc:220 days(306 obs.)
Earth MOID:0.0205924 AU
Jupiter Tisserand invariantTJ:2.875

orbital data, secondary:

semimajor axisas:1.8 km[T19a]
separation/primary radiusas/rp:4 [*E]
separation/Hill radiusas/rH:0.029 [*E]
orbital periodPs:0.92± 0.08d [W18a]
eccentricityes:?
normalized ang. mom.αL:?
other data, system (combined):
absolute mag.H:19.3[MPC]
slope parameterG:(0.15) [*A]
effective diameterdE:1.3 km [*D]
geometric albedo:0.02[*D]
color indexU-B:?
color indexB-V:?
taxonomic type:?
massm:?
densityρ:1 g/cm3[T19a]
Hill radiusrH:62 km [*E]

other data, primary:

diameterdp:0.9 km [T19a]
rotation periodRPp:20.6± 0.1h [W18a]
amplitude in mag., rotationalΔM:0.33 [W18a]
pole directionΒ, λ:?,?

other data, secondary:

diameterds:0.9km [T19a]
diameter ratiods/dp:1 [*D]
component mag. differenceΔM:0 [*D]
rotation periodRPs:?

-- 2017 YE5 --discovery and notes:

Primary discovered2017 Dec 12.

Companion discovered2018 Julusingradar observations.Announced2018 Jul.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


©2018, 2019by Wm. Robert Johnston.
Last modified27 May 2019.
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