Asteroids with Satellites Database--Johnston's Archive
(3187)
Dalian
compiled by Wm. Robert Johnston
last updated
5 January 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
orbital data, primary (osculating elements)
[JPL]
: |
semimajor axis a: |
2.2831827957 AU
| |
orbital period P: |
3.450001049 yr
(= 1260.1128833 d)
| |
eccentricity e: |
0.057610035
| |
perihelion distance q: |
2.151648555 AU
| |
aphelion distance Q: |
2.414717036 AU
| |
inclination i: |
2.7538326°
| |
argument of perihelion ω: |
105.004843°
| |
ascending node Ω: |
312.222738°
| |
mean anomaly M: |
21.174807°
| |
perihelion passage TP: |
2022 Dec 12.881537
| |
Epoch: |
2023 Feb 25
| |
data arc: |
1951-2022
(3223 obs.)
| |
Earth MOID: |
1.16388 AU
| |
Jupiter Tisserand invariant TJ: |
3.6
|
orbital data, secondary:
|
semimajor axis as: |
11
km
[*E]
| |
separation/primary radius as/rp: | 3.7 [*E] | |
separation/Hill radius as/rH: | 0.011 [*E] | |
orbital period Ps: |
0.7275
± 0.0002
d [C23a]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
13.42
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
6.22
± 0.07
km [M**]
| |
geometric albedo: |
0.262
± 0.035
[M**]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
S (Tholen) [LMP]
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
1000 km [*E]
|
other data, primary:
|
diameter dp: |
6.02
± 0.07
km [*D]
| |
rotation period RPp: |
2.7086
± 0.0001
h [C23a]
| |
amplitude in mag., rotational ΔM: |
0.1
[C23a]
| |
amplitude in mag., mutual events ΔM: | 0.1 ±0.03 [C23a] | |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
>1.57
± 0.02
km [*D]
| |
diameter ratio ds/dp: |
>0.26
[C23a]
| |
component mag. difference ΔM: |
<2.9
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(3187) Dalian
--discovery and notes:
Primary discovered
1977 Oct 10
from
Purple Mountain Observatory, Nanking, PR China
by
?.
Alternate designation(s):
1977 TO3,
1958 CB, 1977 UT1, 1982 AG, 1987 QR5.
Linked to prediscovery observations from 1951 Feb 04.
Permanent number assigned 1985 Feb 05.
Named 1993 Sep 01 [MPC022497].
Companion discovered
2022 Nov 20
by M. Conjat, D. Augustin, F. Manzini, R. Nicollerat, R. Roy, and R. Behrend
using
lightcurve
observations from Nice Observatory, France; Deep Sky Chile Observatory, Pichasca, Chile; E-Eye Observatory, Spain; Stazione Astronomica di Sozzago, Italy; Valentines Observatory, Bex, Switzerland; Observatoire de Blauvac, France.
Announced
2023 Jan 04 [C23a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©
2023
by Wm. Robert Johnston.
Last modified
5 January 2023.
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