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Asteroids with Satellites Database--Johnston's Archive

(2535) Hameenlinna

compiled by Wm. Robert Johnston
last updated6 March 2016

--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:main belt asteroid

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

semimajor axisa:2.239903232 AU
orbital periodP:3.352307777 yr
(= 1224.453541 d)
eccentricitye:0.079991841
perihelion distanceq:2.06072925 AU
aphelion distanceQ:2.4190772143 AU
inclinationi:3.4278763°
argument of perihelionω:309.239762°
ascending nodeΩ:172.802065°
mean anomalyM:8.492737°
perihelion passageTP:2015 Dec 15.11400
Epoch:2016 Jan 13
data arc:1951-2016(1845 obs.)
Earth MOID:1.07829 AU
Jupiter Tisserand invariantTJ:3.629

orbital data, secondary:

semimajor axisas:19 km[*E]
separation/primary radiusas/rp:4.1 [*E]
separation/Hill radiusas/rH:0.013 [*E]
orbital periodPs:0.8846± 0.0004d [B16a]
eccentricityes:?
normalized ang. mom.αL:?
other data, system (combined):
absolute mag.H:12.3[MPC]
slope parameterG:(0.15) [*A]
effective diameterdE:9.42± 0.07 km [M11b]
geometric albedo:0.268± 0.03[M11b]
color indexU-B:?
color indexB-V:?
taxonomic type:?
massm:?
densityρ:(1.6 g/cm3) [*A]
Hill radiusrH:1500 km [*E]

other data, primary:

diameterdp:9.2 km [*D]
rotation periodRPp:3.23106± 0.00006h [B16a]
amplitude in mag., rotationalΔM:0.1 [B16a]
amplitude in mag., mutual eventsΔM:0.075 ±0.025 [B16a]
pole directionΒ, λ:?,?

other data, secondary:

diameterds:>2.0km [*D]
axial ratiosa/b, b/c:1.5;? [B16a]
diameter ratiods/dp:>0.22 [B16a]
component mag. differenceΔM:<3.3 [*D]
rotation periodRPs:21.23± 0.01h [B16a]

--(2535) Hameenlinna --discovery and notes:

Primary discovered1939 Feb 17from Turku, Finlandby Y. Vaisala.Alternate designation(s):1939 DH, 1929 EM, 1949 EF, 1954 UN, 1959 CB, 1964 TR, 1969 AZ, 1977 QQ4, 1981 VW, 1981 WV, 1981 YW1.Linked to prediscovery observations from 1929.Permanent number assigned 1982.

Named 1983 May 26 for the town in Hame, Finland [MPC7947].

Companion discovered2015 Dec 18 by V. Benishek, D. Pray, P. Pravec, P. Kusnirak, K. Hornoch, H. Kucakova, J. Vrastil, J. Pollock, R. Groom, K. Stranger, A. Carbognani, R. Montaigut, A. Leroy, D. Reichart, J. Haislipusinglightcurve observations from Sopot Observatory, Serbia; Sugarloaf Mountain Observatory, South Deerfield, Massachusetts, USA; Ondrejov Observatory, Czech Republic; Perth Observatory; Observatory of the Aosta Vally Autonomous Region, Italy; OPERA Observatory, France.Announced2016 Feb 25 [B16a].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

©2016by Wm. Robert Johnston.
Last modified6 March 2016.
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