Asteroids with Satellites Database--Johnston's Archive
(88710)
2001 SL9
compiled by Wm. Robert Johnston
last updated
9 October 2021
--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:
NEA, Apollo
orbital data, primary (osculating elements)
[JPL]
: |
semimajor axis a: |
1.0614194075 AU
| |
orbital period P: |
1.0935502358 yr
(= 399.41922364 d)
| |
eccentricity e: |
0.270148028
| |
perihelion distance q: |
0.774679047 AU
| |
aphelion distance Q: |
1.3481597678 AU
| |
inclination i: |
21.9015069°
| |
argument of perihelion ω: |
329.3392946°
| |
ascending node Ω: |
202.8382315°
| |
mean anomaly M: |
238.2268028°
| |
perihelion passage TP: |
2021 Nov 13.1070997
| |
Epoch: |
2021 Jul 01
| |
data arc: |
1954-2016
(1016 obs.)
| |
Earth MOID: |
0.197073 AU
| |
Jupiter Tisserand invariant TJ: |
5.709
|
orbital data, secondary:
|
binary dynamical type: | A [P07f] | |
semimajor axis as: |
1.35
± 0.64 km
[*D]
| |
separation/primary radius as/rp: | 3.5 [S21c] | |
separation/Hill radius as/rH: | 0.028 [*E] | |
orbital period Ps: |
0.683435
± 0.00002
d [S21c]
| |
eccentricity es: |
<0.07
[S21c]
| |
normalized ang. mom. αL: |
1.14
[P07f]
|
|
other data, system (combined):
|
absolute mag. H: |
17.6
[MPC]
17.98 ± 0.02 [S21c]
| |
slope parameter G: |
0.34 [S21c]
| |
effective diameter dE: |
0.77
± 0.34
km [S21c]
| |
geometric albedo: |
0.2
± 0.05
[S21c]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
color index V-R: | 0.457 ± 0.01 [S21c] | |
taxonomic type: |
Sr, Q (SMASSII) [S21c]
| |
mass m: |
?
| |
density ρ: |
1.8
± 2.5/0.5
g/cm3[S21c]
| |
Hill radius rH: |
48 km [*E]
|
other data, primary:
|
diameter dp: |
0.77
± 0.34
km [S21c]
| |
axial ratios a/b, b/c: | 1.07, 1.64 [S21c] | |
rotation period RPp: |
2.4004
± 0.0002
h [S21c]
| |
amplitude in mag., rotational ΔM: |
0.08
[H03a]
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
0.18
± 0.08
km [S21c]
| |
axial ratios a/b, b/c: | 1.2;? [S21c] | |
diameter ratio ds/dp: |
0.24
± 0.02
[S21c]
| |
component mag. difference ΔM: |
3.10
± 0.18
[*D]
| |
rotation period RPs: |
16.4022
h [S21c]
| |
|
|
--
(88710) 2001 SL9
--discovery and notes:
Primary discovered
2001 Sep 18
from
Palomar Observatory, California, USA
by
NEAT.
Linked to prediscovery observations from 1954 Nov 27.
Permanent number assigned 2004 Aug 30.
Companion discovered
2001 Oct 02
by P. Pravec, P. Kusnirak, and B. D. Warner
using
lightcurve
observations from Ondrejov Observatory, Czech Republic; Palmer Divide Observatory, Colorado Springs, Colorado, USA.
Announced
2001 Nov 03 [P01a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Pravec, Petr & Scheirich, P. 2010, Bulletin of the American Astronomical Society Binary System Candidates for Detection of BYORP
- Haver, R., Pelloni, A., Forti, G., Boattini, A., Gnadig, A., Stoss, R., & Spahr, T. B. 2001, Minor Planet Electronic Circ., 2001-S21 (2001). 2001 SL9
- Tichy, M., Kocer, M., Moravec, Z., Knoefel, A., Griesser, M., Kusnirak, P., Helin, E. F., Pravdo, S., Lawrence, K., Hicks, M., Hovland, E., Bickler, T., Schroeder, J., Scherr, L., Thicksten, R., Deetz, A., Blythe, M., Shelly, F., Bezpalko, M., Huber, R., Manguso, L., Adams, S., Stuart, J., Sayer, R., Evans, J. B., Viggh, H., Klinglesmith, D. A., III, McGaha, J. E., Dyvig, R., & Spahr, T. B. 2001, Minor Planet Electronic Circ., 2001-S16 (2001). 2001 SL9
©
2001-2014, 2021
by Wm. Robert Johnston.
Last modified
9 October 2021.
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