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JPL Small-Body Database Browser
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289 Nenetta
Classification: Main-belt Asteroid          SPK-ID: 2000289
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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2012477609650683 3.7654e-08  
a 2.875996948869573 1.1654e-08 au
q 2.297209002367203 1.1043e-07 au
i 6.678775286105407 4.2787e-06 deg
node 181.9524619386515 3.5196e-05 deg
peri 190.3378741130893 3.6616e-05 deg
M 304.9756063482186 1.2166e-05 deg
tp 2458872.791336152281
(2020-Jan-24.29133615)
6.0848e-05 TDB
period 1781.480440023853
4.88
1.0828e-05
2.965e-08
d
yr
n .202079120214859 1.2283e-09 deg/d
Q 3.454784895371943 1.3999e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2960  
   data-arc span      42748 days (117.04 yr)  
   first obs. used      1902-08-07  
   last obs. used      2019-08-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47115  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:07:11  

Additional Information
 Earth MOID = 1.29688 au 
 Jupiter MOID = 2.00496 au 
 T_jup = 3.256 
[ 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 9.51   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2
diameter diameter 37.586 km 1.002 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 6.902 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Barucci, M.A.; Di Martino, M.; Fulchignoni, M. (1992) Astron. J. 103, 1679-1686.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Lucas, M.P.; Ryan, J.; Fauerbach, M.; Grasso, S. (2011) Minor Planet Bull. 38, 218-220.]
[Pilcher, F. (2018) Minor Planet Bull. 45, 356-359.]
geometric albedo albedo 0.889   0.229 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 1.047   0.038 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=19.28, mean=19.68, max.=20.08) deg.
U-B UB 0.655   0.034 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=19.28, mean=19.68, max.=20.08) deg.
Tholen spectral type spec_T A   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B A   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)

289 Nenetta          Discovered 1890-Mar-10 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1949 HF1 = A912 RC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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