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142 Polana

Classification: Main-belt Asteroid SPK-ID: 2000142

[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB
Reference: MPO253360 (heliocentric ecliptic J2000)

Element	Value	Uncertainty (1-sigma)	Units
e	0.1356596	n/a
a	2.4184174	n/a	AU
q	2.0903359	n/a	AU
i	2.23774	n/a	deg
node	291.30048	n/a	deg
peri	291.65379	n/a	deg
M	186.94651	n/a	deg
t_p	2457060.8484746 (2015-Feb-07.34847460)	n/a	JED
period	1373.7108153 3.76	n/a n/a	d yr
n	0.26206389	n/a	deg/d
Q	2.7464989	n/a	AU

Orbit Determination Parameters

# obs. used (total)	1572
first obs. used	1898-??-??
last obs. used	2013-02-06
# oppositions	44
planetary ephem.	DE403
condition code	0
fit RMS	0.55
data source	MPC:mpn
producer	MPCLINUX

Additional Information

T_jup = 3.501

[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table

Parameter	Symbol	Value	Units	Sigma	Reference	Notes
absolute magnitude	H	10.27	mag	n/a	IRAS-A-FPA-3-RDR-IMPS-V6.0	IRAS observations used: 6
diameter	diameter	55.29	km	1.6	IRAS-A-FPA-3-RDR-IMPS-V6.0	IRAS observations used: 6
rotation period	rot_per	9.764	h	n/a	Asteroid Lightcurve DataBase (Rev. 2013-May-01)	Published Reference List: [Dotto, E.; Rotundi, A.; De Sanctis, M.C. (1992) in Physical Properties of Small Solar System Bodies. A. Brahic, J.-C. Gerard, J. Surdej, eds. Universite de Liege, Institut d'Astrophysique, Liege, p. 211.] [Barucci, M.A.; Di Martino, M.; Dotto, E.; Fulchignoni, M.; et al. (1994) Icarus 109, 267-273.]
geometric albedo	albedo	0.0451		0.003	IRAS-A-FPA-3-RDR-IMPS-V6.0	IRAS observations used: 6
B-V	BV	.621	mag	.022	EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1	#obs=7; phase (min.=1.32, mean=10.93, max.=25.85) deg.
U-B	UB	.236	mag	.035	EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1	#obs=7; phase (min.=1.32, mean=10.93, max.=25.85) deg.
Tholen spectral type	spec_T	F		n/a	EAR-A-5-DDR-TAXONOMY-V4.0	used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type	spec_B	B		n/a	EAR-A-5-DDR-TAXONOMY-V4.0	based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

142 Polana Discovered 1875-Jan-28 by Palisa, J. at Pola
Reference: DISCOVERY.DB	Last Updated: 2003-08-29

Alternate Designations

1954 BH = 1956 XZ = 1963 SA = A923 WA

[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

2013-Jun-19 04:15 UT
(server date/time)

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