Asteroids with Satellites Database--Johnston's Archive
(26420)
1999 XL103
compiled by Wm. Robert Johnston
last updated
1 June 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: |
2.197721402 AU
| |
orbital period P: |
3.2580590867 yr
(= 1190.0285566 d)
| |
eccentricity e: |
0.106771373
| |
perihelion distance q: |
1.963067671 AU
| |
aphelion distance Q: |
2.4323751326 AU
| |
inclination i: |
4.7255913°
| |
argument of perihelion ω: |
261.262963°
| |
ascending node Ω: |
72.972584°
| |
mean anomaly M: |
97.887554°
| |
perihelion passage TP: |
2018 Jun 07.419486
| |
Epoch: |
2019 Apr 27
| |
data arc: |
1997-2018
(968 obs.)
| |
Earth MOID: |
0.958668 AU
| |
Jupiter Tisserand invariant TJ: |
3.656
|
orbital data, secondary:
|
semimajor axis as: |
?
| |
separation/primary radius as/rp: | 7.8 [P19a] | |
orbital period Ps: |
0.9958
± 0.0008
d [P19a]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
15.7
[MPC]
16.07 ± 0.05 [P19a]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
2.02
km [*E]
| |
geometric albedo: |
(0.16
) [*A]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
color index V-R: | 0.482 ± 0.019 [P19a] | |
taxonomic type: |
V (SMASSII) [P19a]
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
300 km [*E]
|
other data, primary:
|
diameter dp: |
1.91
km [*E]
| |
axial ratios a/b, b/c: | 1.08, ? [P19a] | |
rotation period RPp: |
3.2
± 1
h [P19a]
| |
amplitude in mag., rotational ΔM: |
0.09
[P19a]
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
>0.65
km [*E]
| |
diameter ratio ds/dp: |
>0.34
[P19a]
| |
component mag. difference ΔM: |
<2.3
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(26420) 1999 XL103
--discovery and notes:
Primary discovered
1999 Dec 07
from
Socorro, New Mexico, USA
by
LINEAR Program.
Alternate designation(s):
1997 ED33.
Linked to prediscovery observations from 1997 Mar 04.
Permanent number assigned 2001 Jul 05.
Companion discovered
by Pravec, P., et al.
using
lightcurve
observations.
Announced
2019 May [P19a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©
2019, 2019
by Wm. Robert Johnston.
Last modified
1 June 2019.
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