Asteroids with Satellites Database--Johnston's Archive

(127418) 2002 NB19

compiled by Wm. Robert Johnston
last updated 12 March 2025

--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: 3.138094723 AU
orbital period P: 5.559135697 yr
(= 2030.474313 d)
eccentricity e: 0.111418048
perihelion distance q: 2.78845436 AU
aphelion distance Q: 3.48773511 AU
inclination i: 3.9562383°
argument of perihelion ω: 28.277767°
ascending node Ω: 250.77939°
mean anomaly M: 58.794715°
perihelion passage TP: 2024 Jun 07.38567
Epoch: 2025 May 05
data arc: 2002-2024 (793 obs.)
Earth MOID: 1.77301 AU
Jupiter Tisserand invariant TJ: 3.198


orbital data, secondary:
semimajor axis as: 9.6 km (separation) [H25b]
separation/primary radius as/rp:3.6 [*E]
separation/Hill radius as/rH:0.0082 [*E]
orbital period Ps: 0.73 d [*E]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 14.96 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 5.34 ± 1.48 km [M19a]
geometric albedo: 0.098 ± 0.034 [M19a]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 1200 km [*E]

other data, primary:
diameter dp: 5.34 ± 1.48 km [M19a]
dimensions :6 x ?km [H25b]
rotation period RPp: ?
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: >1.7 km [H25b]
diameter ratio ds/dp: >0.32 [*D]
component mag. difference ΔM: <2.49 [*D]
rotation period RPs: ?

-- (127418) 2002 NB19 --discovery and notes:

Primary discovered 2002 Jul 09 from Socorro, New Mexico, USA by LINEAR Program. Linked to prediscovery observations from 2002 Jun 16. Permanent number assigned 2006 Mar 14.

Companion discovered 2024 Aug 17 by S. Kerr, D. Herald, et al. using stellar occultation observations from Glenlee, Queensland, Australia. Announced 2025 Mar 12 [H25b].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2025 by Wm. Robert Johnston.
Last modified 12 March 2025.
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