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289 Nenetta (A890 EA)
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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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2014359561925859 8.1095e-09  
a 2.876388442270011 8.8843e-09 au
q 2.296980386020049 2.1918e-08 au
i 6.678798285372871 5.3716e-07 deg
node 181.9389009100607 5.6604e-06 deg
peri 190.4818402168342 9.5555e-06 deg
M 66.12172552274741 5.6312e-06 deg
tp 2458873.226073413095
(2020-Jan-24.72607341)
2.7642e-05 TDB
period 1781.844206874993
4.88
8.2553e-06
2.26e-08
d
yr
n .2020378653818281 9.3605e-10 deg/d
Q 3.455796498519973 1.0674e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3689  
   data-arc span      43329 days (118.63 yr)  
   first obs. used      1902-08-07  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43008  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:11:34  

Additional Information
 Earth MOID = 1.29605 au 
 Jupiter MOID = 2.00836 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 9.55   n/a E2021B10 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. 2020-October); 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.]
[Franco, L.; Marchini, A.; Arena, C.; Casalnuovo, G.B.; et al. (2020) Minor Planet Bull. 47, 61-63.]
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 (A890 EA)          Discovered 1890-Mar-10 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A890 EA = 1949 HF1 = A912 RC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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