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789 Lena (A914 MA)
Classification: Main-belt Asteroid          SPK-ID: 2000789
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1482449528904662 2.9951e-08  
a 2.686494864191417 7.7802e-09 au
q 2.288235559608881 7.9975e-08 au
i 10.77702373760973 3.2573e-06 deg
node 232.6067842710169 1.9995e-05 deg
peri 43.8077295855478 2.4225e-05 deg
M 18.94404927253914 1.2794e-05 deg
tp 2458915.865435715288
(2020-Mar-07.36543572)
5.7211e-05 TDB
period 1608.33846577155
4.40
6.9867e-06
1.913e-08
d
yr
n .2238334826042361 9.7234e-10 deg/d
Q 3.084754168773953 8.9335e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2912  
   data-arc span      31305 days (85.71 yr)  
   first obs. used      1935-03-02  
   last obs. used      2020-11-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40096  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:56:10  

Additional Information
 Earth MOID = 1.28569 au 
 Jupiter MOID = 2.03595 au 
 T_jup = 3.333 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.3   n/a MPO473772  
diameter diameter 22.483 km 0.306 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.848 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Shipley, H.; Dillard, A.; Kendall, J.; Reichert, M.; et al. (2008) Minor Planet Bull. 35, 99-101.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
[Hanus, J.; Delbo, M.; Durech, J.; Ali-Lagoa, V. (2018) Icarus 309, 297-337.]
[Behrend, R. (2020) 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 0.153   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
SMASSII spectral type spec_B X   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)

789 Lena (A914 MA)          Discovered 1914-Jun-24 by Neujmin, G. at Simeis
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A914 MA = 1970 CE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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