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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 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1084699393496282 1.8036e-08  
a 3.001940706546962 1.0738e-08 au
q 2.676320380176633 5.3088e-08 au
i 14.32830143779145 5.0151e-07 deg
node 127.8429638626972 2.8939e-06 deg
peri 20.88978608168604 9.9463e-06 deg
M 47.22329379236702 8.2999e-06 deg
tp 2458951.295794806555
(2020-Apr-11.79579481)		 4.3481e-05 TDB
period 1899.772478050678
5.20		 1.0193e-05
2.791e-08		 d
yr
n .1894963760973048 1.0167e-09 deg/d
Q 3.327561032917291 1.1902e-08 au
   Orbit Determination Parameters
   # obs. used (total)      3134  
   data-arc span      38387 days (105.10 yr)  
   first obs. used      1916-02-08  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .3704  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:29:41  

Additional Information
 Earth MOID = 1.69341 au 
 Jupiter MOID = 1.71746 au 
 T_jup = 3.197 
[ 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 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

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