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101889 (1999 NE55)
Classification: Main-belt Asteroid          SPK-ID: 2101889
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09678841782319175 5.5925e-08  
a 3.154359340066626 2.9063e-08 au
q 2.84905389029577 1.8449e-07 au
i 20.5959693324894 5.5302e-06 deg
node 267.7475188274696 1.7571e-05 deg
peri 101.0580638592942 3.545e-05 deg
M 255.9462715204661 3.2803e-05 deg
tp 2459791.953112641068
(2022-Jul-31.45311264)
0.00019093 TDB
period 2046.280548156079
5.60
2.828e-05
7.743e-08
d
yr
n .1759289557457794 2.4314e-09 deg/d
Q 3.459664789837482 3.1876e-08 au
  Orbit Determination Parameters
   # obs. used (total)      898  
   data-arc span      7680 days (21.03 yr)  
   first obs. used      1999-07-12  
   last obs. used      2020-07-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52577  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:39:13  

Additional Information
 Earth MOID = 1.93762 au 
 Jupiter MOID = 2.05621 au 
 T_jup = 3.100 
[ 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 13.48   n/a E2021B55  
diameter diameter 10.029 km 0.221 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 170.244 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.092   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101889 (1999 NE55)          Discovered 1999-Jul-12 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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