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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 ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 117 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1278528847679648 1.5452e-08  
a 2.364782484050869 2.208e-09 au
q 2.062438221616212 3.6203e-08 au
i 2.096014804054114 6.7604e-07 deg
node 307.4680401004968 1.0253e-05 deg
peri 87.27597581005828 1.5702e-05 deg
M 191.8163577289229 1.1172e-05 deg
tp 2459821.035282194077
(2022-Aug-29.53528219)
4.1305e-05 TDB
period 1328.266522078319
3.64
1.8603e-06
5.093e-09
d
yr
n .2710299431748933 3.7959e-10 deg/d
Q 2.667126746485526 2.4903e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3636  
   data-arc span      58830 days (161.07 yr)  
   first obs. used      1860-02-22  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47942  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 17:44:49  

Additional Information
 Earth MOID = 1.06905 au 
 Jupiter MOID = 2.73777 au 
 T_jup = 3.537 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457125.5 (2015-Apr-13.0) TDB
Reference: JPL 117 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1266608504300011 1.542e-08  
q 2.065851142623395 3.6089e-08 au
tp 2457161.899279476493
(2015-May-19.39927948)
4.1719e-05 TDB
node 307.6322983235618 1.0237e-05 deg
peri 86.73470943939158 1.582e-05 deg
i 2.098010173767225 6.7632e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3636  
   data-arc span      58830 days (161.07 yr)  
   first obs. used      1860-02-22  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47942  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 17:44:49  

Additional Information
 Jupiter MOID = 2.73777 au 
 T_jup = 3.537 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.377778385825669E-16 -5.557335109239827E-16 8.844073325342185E-15 -7.086405648877803E-16 -1.132239570893764E-14 7.168557278571688E-16
q -5.557335109239827E-16 1.302435968693559E-15 -1.674971540204509E-14 1.222148954165785E-16 2.778391748423012E-14 -1.689734103682391E-15
tp 8.844073325342185E-15 -1.674971540204509E-14 1.740453621064751E-9 -1.756264201668152E-12 5.068358849278488E-10 -1.392444205420075E-12
node -7.086405648877803E-16 1.222148954165785E-16 -1.756264201668152E-12 1.047872640821806E-10 -1.025704372275429E-10 -5.40039722088982E-13
peri -1.132239570893764E-14 2.778391748423012E-14 5.068358849278488E-10 -1.025704372275429E-10 2.502590415088386E-10 1.051790023691424E-13
i 7.168557278571688E-16 -1.689734103682391E-15 -1.392444205420075E-12 -5.40039722088982E-13 1.051790023691424E-13 4.574080559447673E-13

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.56   n/a E2021B10  
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. 2020-October); 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.]
[Cellino, A.; Hestroffer, D.; Lu, X.-P.; Muinonen, K.; Tanga, P. (2019) Astron. Astrophys. 631, A67.]
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

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