Asteroids with Satellites Database--Johnston's Archive

(2607) Yakutia

compiled by Wm. Robert Johnston
last updated 7 December 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: 2.37681987468 AU
orbital period P: 3.6643977496 yr
(= 1338.42127804 d)
eccentricity e: 0.22643560588
perihelion distance q: 1.8386232263 AU
aphelion distance Q: 2.91501652307 AU
inclination i: 2.090836699°
argument of perihelion ω: 336.5409518°
ascending node Ω: 359.7208761°
mean anomaly M: 52.18897096°
perihelion passage TP: 2025 May 10.9699188
Epoch: 2025 Nov 21
data arc: 1951-2025 (4599 obs.)
Earth MOID: 0.827973 AU
Jupiter Tisserand invariant TJ: 3.505


orbital data, secondary:
semimajor axis as: 7.95 km [*E]
separation/primary radius as/rp:3.48 [*E]
separation/Hill radius as/rH:0.012 [*E]
orbital period Ps: 0.7004 ± 0.0004 d [B25p]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 13.76 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 4.7 ± 0.08 km [M19a]
geometric albedo: 0.35 ± 0.049 [M19a]
color index U-B: ?
color index B-V: ?
color index J-H:0.427 ± 0.104 [S10b]
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 660 km [*E]

other data, primary:
diameter dp: 4.57 ± 0.08 km [*D]
dimensions :~5.1 x ~4.3 km [*E]
axial ratios a/b, b/c:1.2, ? [*E]
rotation period RPp: 2.93584 ± 0.0001 h [B25p]
amplitude in mag., rotational ΔM: 0.19 [B25p]
amplitude in mag., mutual events ΔM:0.06 [B25p]
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: >1.10 km [*D]
diameter ratio ds/dp: >0.24 [B25p]
component mag. difference ΔM: <3.1
rotation period RPs: ?

-- (2607) Yakutia --discovery and notes:

Primary discovered 1977 Jul 14 from Nauchnyj, Crimea, Ukraine, USSR by N. S. Chernykh. Alternate designation(s): 1977 NR, 1951 KK, 1966 PN. Linked to prediscovery observations from 1951 May 25. Permanent number assigned 1982 Apr 08.

Named 1982 Dec 01 for the Yakut Autonomous Soviet Socialist Republic, USSR [MPC007473].

Companion discovered 2025 Oct 31 by V. Benishek, P. Pravec, P. Bacci, M. Maestripieri, and N. Ruocco using lightcurve observations from Sopot Observatory, Serbia; San Marcello Pistoiese Observatory, San Marcello Pistoiese, Italy; Osservatorio Astronomico Nastro Verde, Sorrento, Italy. Announced 2025 Dec 06 [B25p].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2025 by Wm. Robert Johnston.
Last modified 7 December 2025.
Return to Home. Return to Astronomy and Space. Return to Asteroids with Satellites.