Asteroids with Satellites Database--Johnston's Archive
(2121)
Sevastopol
compiled by Wm. Robert Johnston
last updated
29 May 2019
--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: |
2.183210944 AU
| |
orbital period P: |
3.225906323 yr
(= 1178.262285 d)
| |
eccentricity e: |
0.178710897
| |
perihelion distance q: |
1.793047358 AU
| |
aphelion distance Q: |
2.57337453 AU
| |
inclination i: |
4.376485398°
| |
argument of perihelion ω: |
159.9851173°
| |
ascending node Ω: |
145.7322062°
| |
mean anomaly M: |
88.85494882°
| |
perihelion passage TP: |
2013 Aug 05.18212
| |
Epoch: |
2014 May 23
| |
data arc: |
1936-2014
(1413 obs.)
| |
Earth MOID: |
0.777982 AU
| |
Jupiter Tisserand invariant TJ: |
3.654
|
orbital data, secondary:
|
semimajor axis as: |
26
km
[*E]
| |
separation/primary radius as/rp: | 6.0 [*E] | |
separation/Hill radius as/rH: | 0.02 [*E] | |
orbital period Ps: |
1.546
d [H10a]
| |
eccentricity es: |
<0.03
[P16d]
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
12.1
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
9.32
± 0.04
km [M11b]
| |
geometric albedo: |
0.248
± 0.022
[M11b]
| |
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: |
8.62
± 0.08
km [*D]
| |
rotation period RPp: |
2.9064
± 0.00002
h [H10a]
| |
amplitude in mag., rotational ΔM: |
0.2
[H10a]
| |
amplitude in mag., mutual events ΔM: | 0.2 [H10a] | |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
3.54
± 0.17
km [*D]
| |
diameter ratio ds/dp: |
0.41
± 0.02
[H10a]
| |
component mag. difference ΔM: |
1.94
± 0.11
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(2121) Sevastopol
--discovery and notes:
Primary discovered
1971 Jun 27
from
Nauchnyj, Crimea, Ukraine, USSR
by
T. M. Smirnova.
Alternate designation(s):
1971 ME,
1932 HM, 1936 WD, 1938 DY, 1939 TO, 1952 SZ, 1968 QJ1, 1977 ED2, 1978 WG.
Linked to prediscovery observations from 1936 Nov 17.
Permanent number assigned -.
Named 1983 Jan 28 for the city of Sevastopol, Crimea, Ukraine [MPC007616].
Companion discovered
2010 Jul 23
by D. Higgins, P. Pravec, P. Kusnirak, J. Pollock, J. Oey, M. Husarik, G. Cervak, D. E. Reichart, K. M. Ivarsen, J. B. Haislip, and A. LaCluyze
using
lightcurve
observations from Canberra, Australia; Ondrejov Observatory, Czech Republic; Appalachian State University, North Carolina, USA; Leura, New South Wales, Australia; Skalnate Pleso Observatory; University of North Carolina, Chapel Hill.
Announced
2010 Aug 26 [H10a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Higgins, D., Pravec, P., Kusnirak, P., Pollock, J., Oey, J., Husarik, M., Cervak, G., Reichart, D. E., Ivarsen, K. M., Haislip, J. B., & Lacluyze, A. 2010, Central Bureau Electronic Telegrams (2121) Sevastopol
©
2010-2014, 2019
by Wm. Robert Johnston.
Last modified
29 May 2019.
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