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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .108469940668728 1.8036e-08  
a 3.001940702790775 1.0742e-08 au
q 2.67632037286802 5.309e-08 au
i 14.32830142265124 5.0153e-07 deg
node 127.8429639457018 2.8939e-06 deg
peri 20.88978598829537 9.9463e-06 deg
M 47.2232944044417 8.3003e-06 deg
tp 2458951.295792044274
(2020-Apr-11.79579204)
4.3483e-05 TDB
period 1899.772474485033
5.20
1.0197e-05
2.792e-08
d
yr
n .1894963764529667 1.0171e-09 deg/d
Q 3.327561032713529 1.1907e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3127  
   data-arc span      38374 days (105.06 yr)  
   first obs. used      1916-02-08  
   last obs. used      2021-03-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .37074  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 11:46:21  

Additional Information
 Earth MOID = 1.69341 au 
 Jupiter MOID = 1.71746 au 
 T_jup = 3.197 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456801.5 (2014-May-24.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1105014608943073 1.7756e-08  
q 2.671110186381025 5.2544e-08 au
tp 2457054.706669980948
(2015-Feb-01.20666998)
4.2023e-05 TDB
node 127.8750642596234 2.893e-06 deg
peri 21.69391190952748 9.9078e-06 deg
i 14.33042442801758 5.0203e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3127  
   data-arc span      38374 days (105.06 yr)  
   first obs. used      1916-02-08  
   last obs. used      2021-03-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .37074  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 11:46:21  

Additional Information
 Jupiter MOID = 1.71746 au 
 T_jup = 3.197 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.152904852406512E-16 -9.181007424910008E-16 -5.672116584513115E-13 -1.036103408582029E-15 -1.368868055301648E-13 9.284284047013014E-16
q -9.181007424910008E-16 2.760884568321295E-15 1.707156096943485E-12 3.009608796716405E-15 4.122532350820147E-13 -2.691721770381661E-15
tp -5.672116584513115E-13 1.707156096943485E-12 1.765913553203268E-9 1.163624152521616E-11 3.962277743088261E-10 -3.344701169943777E-12
node -1.036103408582029E-15 3.009608796716405E-15 1.163624152521616E-11 8.369296009557581E-12 -5.736023755178641E-12 -3.99576935399137E-13
peri -1.368868055301648E-13 4.122532350820147E-13 3.962277743088261E-10 -5.736023755178641E-12 9.816504043992019E-11 -3.249002596326982E-13
i 9.284284047013014E-16 -2.691721770381661E-15 -3.344701169943777E-12 -3.99576935399137E-13 -3.249002596326982E-13 2.520338434184337E-13

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 10.46   n/a E2021B10  
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. 2020-October); 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]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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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