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840 Zenobia (A916 SN)
Classification: Main-belt Asteroid          SPK-ID: 2000840
[ 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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1010108558542286 3.8234e-08  
a 3.130261690067068 1.3202e-08 au
q 2.814071277705689 1.249e-07 au
i 9.989236894247867 4.22e-06 deg
node 272.7644523210034 2.4674e-05 deg
peri 10.40699775263993 3.3036e-05 deg
M 322.1628636207773 2.2397e-05 deg
tp 2459213.110718729196
(2020-Dec-29.61071873)		 0.00012612 TDB
period 2022.876625106879
5.54		 1.2798e-05
3.504e-08		 d
yr
n .1779643877099916 1.1259e-09 deg/d
Q 3.446452102428446 1.4536e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2747  
   data-arc span      38019 days (104.09 yr)  
   first obs. used      1916-09-25  
   last obs. used      2020-10-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41156  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:25:15  

Additional Information
 Earth MOID = 1.79826 au 
 Jupiter MOID = 1.69381 au 
 T_jup = 3.182 
[ 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 10.1   n/a MPO394997  
diameter diameter 27.306 km 0.256 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.565 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]
[Warner, B.D. (2006) Minor Planet Bull. 33, 58-62.]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.232   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

840 Zenobia (A916 SN)          Discovered 1916-Sep-25 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A916 SN = 1937 LR = 1942 HE = 1943 OF = 1952 BM1 = 1956 YA 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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