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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1024512108378604 1.5069e-08  
a 3.134812555651435 1.1628e-08 au
q 2.813647213575218 4.785e-08 au
i 9.976719288243565 9.9459e-07 deg
node 272.7282827470018 4.2212e-06 deg
peri 10.05675157425516 1.4602e-05 deg
M 32.87533698555455 1.0971e-05 deg
tp 2459211.367141996395
(2020-Dec-27.86714200)
6.176e-05 TDB
period 2027.289603467266
5.55
1.1279e-05
3.088e-08
d
yr
n .1775769970823573 9.8801e-10 deg/d
Q 3.455977897727652 1.2819e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2892  
   data-arc span      38259 days (104.75 yr)  
   first obs. used      1916-09-25  
   last obs. used      2021-06-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40382  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 11:37:52  

Additional Information
 Earth MOID = 1.79755 au 
 Jupiter MOID = 1.68195 au 
 T_jup = 3.181 
[ 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 10.13   n/a E2021B10  
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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