Asteroids with Satellites Database--Johnston's Archive
(702)
Alauda
and Pichi unem
compiled by Wm. Robert Johnston
last updated
21 September 2014
--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: |
3.191997731 AU
| |
orbital period P: |
5.702982819 yr
(= 2083.014475 d)
| |
eccentricity e: |
0.020054628
| |
perihelion distance q: |
3.12798341 AU
| |
aphelion distance Q: |
3.256012057 AU
| |
inclination i: |
20.6112798°
| |
argument of perihelion ω: |
351.67096°
| |
ascending node Ω: |
289.933133°
| |
mean anomaly M: |
102.06572°
| |
perihelion passage TP: |
2012 Oct 09.4323
| |
Epoch: |
2014 May 23
| |
data arc: |
1910-2014
(1545 obs.)
| |
Earth MOID: |
2.11148 AU
| |
Jupiter Tisserand invariant TJ: |
3.096
|
orbital data, secondary:
|
binary dynamical type: | L [L14c] | |
semimajor axis as: |
1227
± 24 km
[R11a]
| |
separation/primary radius as/rp: | 12 [*D] | |
separation/Hill radius as/rH: | 0.026 [*D] | |
orbital period Ps: |
4.914
± 0.007
d [R11a]
| |
eccentricity es: |
0.003
± 0.02
[R11a]
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
7.25
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
201.96
± 4.64
km [M11b]
| |
geometric albedo: |
0.054
± 0.011
[M11b]
| |
color index U-B: |
0.316
[JPL]
| |
color index B-V: |
0.665
[JPL]
| |
taxonomic type: |
B (SMASSII) [JPL]
C (Tholen) [JPL]
| |
mass m: |
6.06x1018
± 3.6x1017
kg [R11a]
| |
density ρ: |
1.57
± 0.5
g/cm3[R11a]
| |
Hill radius rH: |
47000 km [*D]
|
other data, primary:
|
diameter dp: |
201.96
± 4.64
km [M11b]
| |
rotation period RPp: |
8.354
± 0.001
h [B08b]
| |
amplitude in mag., rotational ΔM: |
?
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
3.51
± 0.9
km [*D]
| |
diameter ratio ds/dp: |
0.017
± 0.004
[R11a]
| |
component mag. difference ΔM: |
8.8
[* D]
| |
rotation period RPs: |
?
| |
|
|
--
(702) Alauda and Pichi unem
--discovery and notes:
Primary discovered
1910 Jul 16
from
Heidelberg, Germany
by
J. Helffrich.
Alternate designation(s):
1910 KQ
.
Permanent number assigned -.
Named - for the Alaudidae bird family.
Companion discovered
2007 Jul 26
by P. Rojo and J. L. Margot
using
adaptive optics telescope
observations from Very Large Telescope, ESO, Cerro Paranal, Chile.
Announced
2007 Aug 02 [R07c].
Provisional designation S/2007 (702) 1.
Permanent designation I Pichi unem, assigned 2011 Oct 12; named for the Mapudungun words for "little bird" [MPC76674].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Rojo, P. & Margot, J.-L. 2011, EPSC-DPS Joint Meeting 2011 First Satellite to a B-type Asteroid, (702) Alauda: Dynamical Mass and Density
- Rojo, P. & Margot, J. L. 2011, The Astrophysical Journal Mass and Density of the B-type Asteroid (702) Alauda
- Benishek, Vladimir 2008, Minor Planet Bulletin CCD Photometry of Seven Asteroids at the Belgrade Astronomical Observatory
- Margot, Jean-Luc & Rojo, P. 2007, Bulletin of the American Astronomical Society Discovery of a Satellite to Asteroid Family Member (702) Alauda
- Rojo, P. & Margot, J. L. 2007, Central Bureau Electronic Telegrams S/2007 (702) 1
- Fauerbach, Michael & Bennett, Thomas 2005, Minor Planet Bulletin Photometric lightcurve observations of 125 Liberatrix, 218 Bianca, 423 Diotima, 702 Alauda, 1963 Bezovec, and (5849) 1990 HF1
- Foglia, Sergio & Masi, Gianluca 2004, Minor Planet Bulletin New clusters for highly inclined main-belt asteroids
- Bus, S. & Binzel, R. P. 2004, NASA Planetary Data System 702 Alauda CCD Spectrum
- Scardia, M., Ghiringhelli, D., & Debehogne, H. 1993, Astronomische Nachrichten Revised orbital elements of minor planets
- Pfleiderer, J., Pfleiderer, M., & Hanslmeier, A. 1987, Astronomy and Astrophysics Supplement Series Photoelectric five-colour photometry of the asteroids 16 Psyche, 201 Penelope and 702 Alauda
- di Martino, M., Zappala, V., de Campos, J. A., Debehogne, H., & Lagerkvist, C.-I. 1987, Astronomy and Astrophysics Supplement Series Rotational properties and lightcurves of the minor planets 94, 107, 197, 201, 360, 451, 511 and 702
- Renaux, J. 1922, Journal des Observateurs Eléments de la planète 702 [1910 KQ]
©
2007-2008, 2014
by Wm. Robert Johnston.
Last modified
21 September 2014.
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