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JPL Small-Body Database Browser
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17981 (1999 JZ56)
Classification: Main-belt Asteroid          SPK-ID: 2017981
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0742468037290263 3.2763e-08  
a 3.160249387741089 1.8207e-08 au
q 2.925610971714701 1.0714e-07 au
i 1.500316643360863 4.1399e-06 deg
node 42.65422465836083 0.00014983 deg
peri 47.40742894987991 0.00015284 deg
M 340.4306728355027 3.0696e-05 deg
tp 2458712.045962135651
(2019-Aug-16.54596214)
0.00017525 TDB
period 2052.014667202576
5.62
1.7733e-05
4.855e-08
d
yr
n .1754373425072895 1.5161e-09 deg/d
Q 3.394887803767477 1.9559e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1921  
   data-arc span      14624 days (40.04 yr)  
   first obs. used      1979-11-14  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51491  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 23:47:08  

Additional Information
 Earth MOID = 1.94243 au 
 Jupiter MOID = 1.74703 au 
 T_jup = 3.200 
[ 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 13.2   n/a MPO384908  
diameter diameter 9.965 km 0.260 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.134 h n/a LCDB (Rev. 2019-January); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.070   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17981 (1999 JZ56)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 JZ56 = 1979 VV2 = 1990 TV7 = 1998 FK20 = 2000 NP25 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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