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816 Juliana (A916 CE)
Classification: Main-belt Asteroid          SPK-ID: 2000816
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 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1086553199578939 3.9083e-08  
a 3.002660933895471 1.1507e-08 au
q 2.676405849397991 1.1969e-07 au
i 14.3281284473192 4.2957e-06 deg
node 127.8423997748795 1.4704e-05 deg
peri 20.95328255936032 2.2886e-05 deg
M 9.268314278216732 1.6639e-05 deg
tp 2458951.572151572520
(2020-Apr-12.07215157)
8.7834e-05 TDB
period 1900.456210822593
5.20
1.0924e-05
2.991e-08
d
yr
n .1894282004236119 1.0889e-09 deg/d
Q 3.328916018392952 1.2757e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2947  
   data-arc span      38116 days (104.36 yr)  
   first obs. used      1916-02-08  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .37644  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:21:21  

Additional Information
 Earth MOID = 1.69364 au 
 Jupiter MOID = 1.71674 au 
 T_jup = 3.196 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456672.5 (2014-Jan-15.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1103972970034852 3.8958e-08  
q 2.67031038270065 1.1963e-07 au
tp 2457055.566487905404
(2015-Feb-02.06648791)
8.7146e-05 TDB
node 127.8808317986126 1.4705e-05 deg
peri 21.89541876397823 2.2701e-05 deg
i 14.32919781874376 4.2961e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2947  
   data-arc span      38116 days (104.36 yr)  
   first obs. used      1916-02-08  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .37644  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:21:21  

Additional Information
 Jupiter MOID = 1.71674 au 
 T_jup = 3.196 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.517732047560334E-15 -4.644406946239961E-15 -7.046825978567813E-14 1.02956655268899E-15 8.786168092211575E-15 -7.6719348754539E-16
q -4.644406946239961E-15 1.431238260437965E-14 9.202672501781253E-14 -2.982629919585397E-15 -5.641331838573496E-14 2.644407646413018E-15
tp -7.046825978567813E-14 9.202672501781253E-14 7.594415368535006E-9 -4.964535133894855E-12 1.520217916033655E-9 2.311289662566588E-12
node 1.02956655268899E-15 -2.982629919585397E-15 -4.964535133894855E-12 2.162397106686959E-10 -2.101200489777534E-10 3.791253073816691E-12
peri 8.786168092211575E-15 -5.641331838573496E-14 1.520217916033655E-9 -2.101200489777534E-10 5.153293331567831E-10 -3.271500193487677E-12
i -7.6719348754539E-16 2.644407646413018E-15 2.311289662566588E-12 3.791253073816691E-12 -3.271500193487677E-12 1.84568513125109E-11

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 10.5   n/a MPO502160  
diameter diameter 50.745 km 0.250 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 10.557 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Stephens, R.D. (2005) Minor Planet Bull. 32, 82-83.]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Behrend, R. (2016) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.043   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

816 Juliana (A916 CE)          Discovered 1916-Feb-08 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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