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139 Juewa (A874 TA)
Classification: Main-belt Asteroid          SPK-ID: 2000139
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 109 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1743901788457784 3.0087e-08  
a 2.78115030833059 6.2448e-09 au
q 2.296145008663827 8.4496e-08 au
i 10.9100168819683 3.7848e-06 deg
node 1.817494436282442 1.6856e-05 deg
peri 165.5994945189542 1.9623e-05 deg
M 40.1775241452786 1.0361e-05 deg
tp 2459011.432975885800
(2020-Jun-10.93297589)
4.8531e-05 TDB
period 1694.084693596298
4.64
5.7059e-06
1.562e-08
d
yr
n .2125041335659387 7.1574e-10 deg/d
Q 3.266155607997354 7.3339e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2722  
   data-arc span      46028 days (126.02 yr)  
   first obs. used      1895-03-15  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47785  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 17:55:08  

Additional Information
 Earth MOID = 1.30369 au 
 Jupiter MOID = 1.7041 au 
 T_jup = 3.285 
[ 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 8.05   n/a E2020-QM5 IRAS observations used: 20
diameter diameter 151.116 km 1.596 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 20.991 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Goguen, J.; Veverka, J.; Elliot, J.L.; Church, C. (1976) Icarus 29, 137-142.]
[Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R.; Greenberg, R.; et al. (1990) Icarus 86, 402-447.]
[Harris, A.W.; Young, J.W.; Bowell, E.; Tholen, D.J. (1999) Icarus 142, 173-201.]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.052   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.693   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=9.17, mean=10.05, max.=10.89) deg.
U-B UB 0.287   0.013 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=9.17, mean=10.05, max.=10.89) deg.
Tholen spectral type spec_T CP   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo
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)

139 Juewa (A874 TA)          Discovered 1874-Oct-10 by Watson, J. C. at Peking
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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