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30 Urania (A854 OA)
Classification: Main-belt Asteroid          SPK-ID: 2000030
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 113 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1277283571148532 2.691e-08  
a 2.365084760576064 3.0659e-09 au
q 2.062996369670307 6.3246e-08 au
i 2.096021963190929 3.0104e-06 deg
node 307.4686482852106 8.0078e-05 deg
peri 87.31845881112748 8.1103e-05 deg
M 137.5647324892518 1.3079e-05 deg
tp 2458492.839820901190
(2019-Jan-09.33982090)
4.7956e-05 TDB
period 1328.521207205857
3.64
2.5833e-06
7.073e-09
d
yr
n .2709779851818484 5.2692e-10 deg/d
Q 2.667173151481821 3.4576e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3574  
   data-arc span      58614 days (160.48 yr)  
   first obs. used      1860-02-22  
   last obs. used      2020-08-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48139  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:34:12  

Additional Information
 Earth MOID = 1.07075 au 
 Jupiter MOID = 2.73679 au 
 T_jup = 3.537 
[ 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 7.5   n/a MPO502153  
diameter diameter 92.787 km 2.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 13.686 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Bailey, S.J. (1913) Ann. Harvard Coll. Obs. 72, 165-189.]
[Rigollet, R. (1950) C. R. 230, 2077-2078.]
[Gehrels, T.; Owings, D. (1962) Astrophys. J. 135, 906-924.]
[Harris, A.W.; Young, J.W. (1980) Icarus 43, 20-32.]
[Wisniewski, W.Z.; Michalowski, T.M.; Harris, A.W.; McMillan, R.S. (1997) Icarus 126, 395-449; 1995, Lunar & Planetary Sci. XXVI, 1511-1512.]
[Durech, J. (2006) IAU 2006, poster paper.]
[Durech, J.; Kaasalainen, M.; Warner, B.D.; Fauerbach, M.; et al. (2009) Astron. Astrophys. 493, 291-297.]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
[Husar, D.; Kretlow, M. (2015) Minor Planet Bull. 42, 157-158.]
geometric albedo albedo 0.192   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.873   0.022 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=7; phase (min.=.70, mean=9.32, max.=24.88) deg.
U-B UB 0.459   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=7; phase (min.=.70, mean=9.32, max.=24.88) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Sl   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)

30 Urania (A854 OA)          Discovered 1854-Jul-22 by Hind, J. R. at London
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A854 OA = 1948 JK 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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