Asteroids with Satellites Database--Johnston's Archive
(2691)
Sersic
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: |
2.244304321 AU
| |
orbital period P: |
3.362256337 yr
(= 1228.0641270 d)
| |
eccentricity e: |
0.112147656
| |
perihelion distance q: |
1.99261085 AU
| |
aphelion distance Q: |
2.495997791 AU
| |
inclination i: |
3.5944525°
| |
argument of perihelion ω: |
277.198200°
| |
ascending node Ω: |
319.897709°
| |
mean anomaly M: |
320.859247°
| |
perihelion passage TP: |
2014 Oct 03.5204
| |
Epoch: |
2014 May 23
| |
data arc: |
1950-2014
(1461 obs.)
| |
Earth MOID: |
0.984655 AU
| |
Jupiter Tisserand invariant TJ: |
3.621
|
orbital data, secondary:
|
semimajor axis as: |
12
km
[*E]
| |
separation/primary radius as/rp: | 4.8 [*E] | |
separation/Hill radius as/rH: | 0.015 [*E] | |
orbital period Ps: |
1.117
± 0.0004
d [O11a]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
13.1
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
5.44
± 0.12
km [M11b]
| |
geometric albedo: |
0.261
± 0.062
[M11b]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
790 km [*E]
|
other data, primary:
|
diameter dp: |
5
± 0.11
km [*D]
| |
rotation period RPp: |
3.8811
± 0.0003
h [O11a]
| |
amplitude in mag., rotational ΔM: |
0.21
[O11a]
| |
amplitude in mag., mutual events ΔM: | 0.45 [O11a] | |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
2.15
± 0.11
km [*D]
| |
diameter ratio ds/dp: |
>0.43
± 0.02
[O11a]
| |
component mag. difference ΔM: |
1.8
± 0.1
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(2691) Sersic
--discovery and notes:
Primary discovered
1974 May 18
from
Felix Aguilar Observatory, El Leoncito, Argentina
by
?.
Alternate designation(s):
1974 KB,
1938 UU, 1978 QR1.
Linked to prediscovery observations from 1950 Mar 21.
Permanent number assigned 1982.
Named 1989 Feb 20 for Jose Luis Sersic (1933-1993) [MPC14207].
Companion discovered
2011 Jun 03
by J. Oey, P. Pravec, P. Kusnirak, N. Morales, A. Thirouin, J. Pollock, D. E. Reichart, K. M. Ivarsen, J. B. Haislip, and A. LaCluyze
using
lightcurve
observations from Leura, New South Wales, Australia; Ondrejov Observatory, Czech Republic; Instituto de Astrofisica de Andalucia; Appalachian State University, North Carolina, USA; University of North Carolina at Chapel Hill, North Carolina, USA.
Announced
2011 Jul 16 [O11a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Ditteon, Richard, Horn, Lauren, Kamperman, Amy, Vorjohan, Bradley, & Kirkpatrick, Elaine 2012, Minor Planet Bulletin Asteroid Lightcurve Analysis at the Oakley Souther Sky Observatory: 2011 April-May
- Oey, J., Pravec, P., Kusnirak, P., Morales, N., Thirouin, A., Pollock, J., Reichart, D. E., Ivarsen, K. M., Haislip, J. B., & Lacluyze, A. 2011, Central Bureau Electronic Telegrams (2691) Sersic
©
2011-2012, 2014
by Wm. Robert Johnston.
Last modified
21 September 2014.
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