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1234 Elyna (1931 UF)
Classification: Main-belt Asteroid          SPK-ID: 2001234
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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08636982316506935 3.1998e-08  
a 3.012656047039918 1.1721e-08 au
q 2.752453476999903 9.8228e-08 au
i 8.529282001623434 3.9208e-06 deg
node 304.3511599263283 2.4209e-05 deg
peri 89.94498770923651 3.3647e-05 deg
M 334.2859699189922 2.2799e-05 deg
tp 2459136.923881182240
(2020-Oct-14.42388118)
0.00012094 TDB
period 1909.953323959159
5.23
1.1146e-05
3.052e-08
d
yr
n .1884862815672128 1.0999e-09 deg/d
Q 3.272858617079933 1.2733e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2837  
   data-arc span      32520 days (89.03 yr)  
   first obs. used      1931-10-18  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41349  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:21:08  

Additional Information
 Earth MOID = 1.77577 au 
 Jupiter MOID = 2.10771 au 
 T_jup = 3.227 
[ 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 10.8   n/a MPO452176  
diameter diameter 22.876 km 0.465 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 5.4221 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]
[Behrend, R. (2015) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Aznar Macias, A.; Carreno Garcerain, A.; Arce Masego, E.; Brines Rodriques, P.; et al. (2016) Minor Planet Bull. 43, 257-263.]
geometric albedo albedo 0.162   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B K   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

1234 Elyna (1931 UF)          Discovered 1931-Oct-18 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1931 UF = 1933 BN 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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