Asteroids with Satellites Database--Johnston's Archive
(48470)
1991 TC2
compiled by Wm. Robert Johnston
last updated
24 October 2023
--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, inner
orbital data, primary (osculating elements)
[JPL]
: |
semimajor axis a: |
1.9211820433 AU
| |
orbital period P: |
2.6629375423 yr
(= 972.6379373 d)
| |
eccentricity e: |
0.1201001807
| |
perihelion distance q: |
1.690447733 AU
| |
aphelion distance Q: |
2.1519163538 AU
| |
inclination i: |
24.97227624°
| |
argument of perihelion ω: |
55.442762°
| |
ascending node Ω: |
26.79274601°
| |
mean anomaly M: |
294.7147366°
| |
perihelion passage TP: |
2024 Mar 07.385900
| |
Epoch: |
2023 Sep 13
| |
data arc: |
1990-2023
(1805 obs.)
| |
Earth MOID: |
0.756051 AU
| |
Jupiter Tisserand invariant TJ: |
3.802
|
orbital data, secondary:
|
semimajor axis as: |
4.3
km
[*E]
| |
separation/primary radius as/rp: | 2.7 [*E] | |
separation/Hill radius as/rH: | 0.010 [*E] | |
orbital period Ps: |
0.4658
± 0.0002
d [W23e]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
14.98
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
3.33
km [*E]
| |
geometric albedo: |
(0.16
) [*A]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
420 km [*E]
|
other data, primary:
|
diameter dp: |
3.21
km [*E]
| |
rotation period RPp: |
2.5141
± 0.0002
h [W23e]
| |
amplitude in mag., rotational ΔM: |
0.11
[W23e]
| |
amplitude in mag., mutual events ΔM: | 0.085 ±0.005 [W23e] | |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
>0.90
km [*E]
| |
diameter ratio ds/dp: |
>0.28
± 0.02
[W23e]
| |
component mag. difference ΔM: |
<2.8
± 0.2
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(48470) 1991 TC2
--discovery and notes:
Primary discovered
1991 Oct 10
from
Palomar Observatory, California, USA
by
K. J. Lawrence.
Alternate designation(s):
1998 HG1.
Linked to prediscovery observations from 1990 Feb 28.
Permanent number assigned 2002 Nov 20.
Companion discovered
2023 Sep 28
by B. D. Warner
using
observations from Center for Solar System Studies, Landers, California, USA.
Announced
2023 Oct 18 [W23e].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©
2023
by Wm. Robert Johnston.
Last modified
24 October 2023.
Return to Home. Return to Astronomy and Space. Return to Asteroids with Satellites.