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167 Urda

Classification: Main-belt Asteroid SPK-ID: 2000167

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)

Element	Value	Uncertainty (1-sigma)	Units
e	.03735439703196525	3.846e-08
a	2.85240070404957	1.0608e-08	au
q	2.745850995656244	1.1006e-07	au
i	2.212657604882228	4.1149e-06	deg
node	166.214050445496	0.00010666	deg
peri	132.8562332517554	0.00011962	deg
M	242.2601391013624	5.5215e-05	deg
t_p	2459175.986641417861 (2020-Nov-22.48664142)	0.00027064	TDB
period	1759.601118339926 4.82	9.8162e-06 2.688e-08	d yr
n	.2045918226851535	1.1413e-09	deg/d
Q	2.958950412442894	1.1005e-08	au

Orbit Determination Parameters

# obs. used (total)	2723
data-arc span	49350 days (135.11 yr)
first obs. used	1884-03-29
last obs. used	2019-05-11
planetary ephem.	DE431
SB-pert. ephem.	SB431-N16
condition code	0
norm. resid. RMS	.47163
source	ORB
producer	Otto Matic
solution date	2019-May-29 19:03:59

Additional Information

Earth MOID = 1.73003 au

Jupiter MOID = 2.11166 au

T_jup = 3.303

[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table

Parameter	Symbol	Value	Units	Sigma	Reference	Notes
absolute magnitude	H	9.2		n/a	MPO384743
diameter	diameter	39.935	km	0.264	urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)
rotation period	rot_per	13.07	h	n/a	LCDB (Rev. 2019-January); Warner et al., 2009	Published Reference List: [Slivan, S.M.; Binzel, R.P. (1996) Icarus 124, 452-470.] [Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Warner, B.D. (2008) Minor Planet Bull. 35, 67-71.] [Warner, B.D.; Durech, J.; Faurerbach, M.; Marks, S. (2008) Minor Planet Bull. 35, 167-171.] [Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.]
geometric albedo	albedo	0.223		0.021	urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)
B-V	BV	0.837		0.038	EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2	#obs=3; phase (min.=4.74, mean=12.85, max.=18.02) deg.
U-B	UB	0.400		0.040	EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2	#obs=3; phase (min.=4.74, mean=12.85, max.=18.02) deg.
Tholen spectral type	spec_T	S		n/a	EAR-A-5-DDR-TAXONOMY-V4.0	used 4 color indices
SMASSII spectral type	spec_B	Sk		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)

167 Urda Discovered 1876-Aug-28 by Peters, C. H. F. at Clinton
Reference: DISCOVERY.DB	Last Updated: 2003-08-29

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Alternate Designations

A899 KC = A905 QA = A906 WA

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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