Asteroids with Satellites Database--Johnston's Archive
(3951)
Zichichi
compiled by Wm. Robert Johnston
last updated
21 September 2014
--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: |
2.339662074 AU
| |
orbital period P: |
3.578803925 yr
(= 1307.1581340 d)
| |
eccentricity e: |
0.173971564
| |
perihelion distance q: |
1.93262740 AU
| |
aphelion distance Q: |
2.746696744 AU
| |
inclination i: |
5.4152373°
| |
argument of perihelion ω: |
151.973843°
| |
ascending node Ω: |
270.077545°
| |
mean anomaly M: |
24.148928°
| |
perihelion passage TP: |
2014 Feb 24.31536
| |
Epoch: |
2014 May 23
| |
data arc: |
1938-2014
(1214 obs.)
| |
Earth MOID: |
0.946767 AU
| |
Jupiter Tisserand invariant TJ: |
3.539
|
orbital data, secondary:
|
binary dynamical type: | A [M09a] | |
semimajor axis as: |
16
km
[*E]
| |
separation/primary radius as/rp: | 5.0 [*E] | |
separation/Hill radius as/rH: | 0.016 [*E] | |
orbital period Ps: |
1.15
± 0.0004
d [A11a]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
0.86
[M09a]
|
|
other data, system (combined):
|
absolute mag. H: |
12.7
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
6.72
± 0.21
km [M12b]
| |
geometric albedo: |
0.325
± 0.05
[M12b]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
970 km [*E]
|
other data, primary:
|
diameter dp: |
6.38
± 0.2
km [*D]
| |
rotation period RPp: |
3.39423
± 0.00007
h [A11a]
| |
amplitude in mag., rotational ΔM: |
0.29
± 0.03
[A11a]
| |
amplitude in mag., mutual events ΔM: | 0.175 ±0.055 [A11a] | |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
2.11
km [*D]
| |
diameter ratio ds/dp: |
>0.33
[A11a]
| |
component mag. difference ΔM: |
<2.4
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(3951) Zichichi
--discovery and notes:
Primary discovered
1986 Feb 13
from
Osservatorio San Vittore, Bologna, Italy
by
?.
Alternate designation(s):
1986 CK1,
1938 UG, 1976 JG9, 1979 DR, 1981 UJ12, 1986 AU2.
Linked to prediscovery observations from 1938 Oct 16.
Permanent number assigned 1988 Dec 23.
Named 1989 May 20 for Antonio Zichichi (1929-) [MPC14634].
Companion discovered
2006 Nov 29
by P. Antonini, R. Behrend, F. Colas and J. Lecacheux, R. Goncalves, D. Starkey, F. Manzini, V. Reddy, H. Hamanowa, H. Hamanowa, and R. Naves
using
lightcurve
observations from Bedoin, France; Geneva Observatory; Paris Observatory; Linhaceira, Portugal; Auburn, Indiana, USA; Sozzago, Italy; University of North Dakota; Motomiya, Fukushima, Japan; Barcelona, Spain.
Announced
2011 Apr 14 [A11a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Marchis, F., Enriquez, J. E., Allain, M., & Emery, J. P. 2011, Central Bureau Electronic Telegrams (3951) Zichichi.
- Husarik, M., Kanuchova, Z., Krisandova, Z., Pikler, M., Pravec, P., Kusnirak, P., Pollock, J., Durkee, R., Vilagi, J., Gajdos, S., Galad, A., Veres, P., Reichart, D. E., Ivarsen, K. M., Haislip, J. B., & Lacluyze, A. 2011, Central Bureau Electronic Telegrams (3951) Zichichi.
- Antonini, P., Behrend, R., Colas, F., Lecacheux, J., Goncalves, R., Starkey, D., Manzini, F., Reddy, V., Hamanowa, H., Naves, R., Husarik, M., Kanuchova, Z., Krisandova, Z., Pikler, M., Pravec, P., Kusnirak, P., Pollock, J., Durkee, R., Vilagi, J., Gajdos, S., Galad, A., Veres, P., Reichart, D. E., Ivarsen, K. M., Haislip, J. B., Lacluyze, A., Marchis, F., Enriquez, J. E., Allain, M., & Emery, J. P. 2011, Central Bureau Electronic Telegrams (3951) Zichichi
©
2011, 2014
by Wm. Robert Johnston.
Last modified
21 September 2014.
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