Asteroids with Satellites Database--Johnston's Archive

(25015) 1998 QN2

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: 2.2283513608 AU
orbital period P: 3.3264079163 yr
(= 1214.993438 d)
eccentricity e: 0.197874383
perihelion distance q: 1.787417711 AU
aphelion distance Q: 2.66928501 AU
inclination i: 5.755463°
argument of perihelion ω: 41.351514°
ascending node Ω: 265.727845°
mean anomaly M: 333.322025°
perihelion passage TP: 2018 Jun 21.037680
Epoch: 2018 Mar 23
data arc: 1968-2018 (1264 obs.)
Earth MOID: 0.776653 AU
Jupiter Tisserand invariant TJ: 3.612


orbital data, secondary:
semimajor axis as: ?
orbital period Ps: ?
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 14.7 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 2.899 ± 0.353 km [**]
geometric albedo: 0.365 ± 0.134 [**]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 500 km [*E]

other data, primary:
diameter dp: 2.9 ± 0.35 km [**]
rotation period RPp: ?
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: ?
diameter ratio ds/dp: ?
component mag. difference ΔM: ?
rotation period RPs: ?

-- (25015) 1998 QN2 --discovery and notes:

Primary discovered 1998 Aug 19 from Haleakala, Hawaii, USA by JPL/GEODSS NEAT. Alternate designation(s): 1968 OJ1, 1988 PY3. Linked to prediscovery observations from 1968 Jul 25. Permanent number assigned 2001 Jun 06.

Companion discovered using lightcurve observations. Announced 2018 Sep 14.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2018 by Wm. Robert Johnston.
Last modified 23 September 2018.
Return to Home. Return to Astronomy and Space. Return to Asteroids with Satellites.