Asteroids with Satellites Database--Johnston's Archive
(10430)
Martschmidt
compiled by Wm. Robert Johnston
last updated
22 February 2025
--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: |
2.74358424588 AU
| |
orbital period P: |
4.54449524 yr
(= 1659.8768864 d)
| |
eccentricity e: |
0.09413813247
| |
perihelion distance q: |
2.4853083487 AU
| |
aphelion distance Q: |
3.00186014308 AU
| |
inclination i: |
2.745284024°
| |
argument of perihelion ω: |
71.01367922°
| |
ascending node Ω: |
291.99258956°
| |
mean anomaly M: |
85.45187366°
| |
perihelion passage TP: |
2024 Apr 06.0011389
| |
Epoch: |
2025 May 05
| |
data arc: |
1960-2025
(4151 obs.)
| |
Earth MOID: |
1.48391 AU
| |
Jupiter Tisserand invariant TJ: |
3.341
|
orbital data, secondary:
|
semimajor axis as: |
>10.7
km
[N25a]
| |
separation/primary radius as/rp: | 4.7 [*E] | |
separation/Hill radius as/rH: | 0.0095 [*E] | |
orbital period Ps: |
0.9662
± 0.0008
d [N25a]
| |
eccentricity es: |
0.0
[N25a]
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
13.55
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
5.69
± 0.13
km []
| |
geometric albedo: |
0.261
± 0.054
[]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
1100 km [*E]
|
other data, primary:
|
diameter dp: |
>4.6
± 0.3
km [N25a]
| |
rotation period RPp: |
?
| |
amplitude in mag., rotational ΔM: |
?
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
>3.7
± 0.3
km [N25a]
| |
diameter ratio ds/dp: |
>0.78
[N25a]
| |
component mag. difference ΔM: |
<0.54
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(10430) Martschmidt
--discovery and notes:
Primary discovered
1960 Sep 24
from
Palomar Observatory, California, USA
by
C. J. van Houten, I. van Houten-Groeneveld, and T. Gehrels.
Alternate designation(s):
4030 P-L,
1978 RH4, 1996 PT2.
Permanent number assigned 1999 Apr 02.
Named 2001 Jul 05 for Maarten Schmidt (1929-) [MPC043044].
Companion discovered
2024 Nov 17
by R. Nolthenius, J.-F. Gout, and M. Conjat
using
lightcurve
observations from Cabrillo College Observatory, Aptos, California, USA; Tree Gate Farm Observatory, Starkville, Mississippi, USA; Observatoire de la Cote d’Azur, France.
Announced
2025 Feb 21 [N25a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©
2025
by Wm. Robert Johnston.
Last modified
22 February 2025.
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