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JPL Small-Body Database Browser
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17944 (1999 JF7)
Classification: Main-belt Asteroid          SPK-ID: 2017944
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1349903184855618 5.7701e-08  
a 2.574235731009713 1.345e-08 au
q 2.226738829823799 1.5503e-07 au
i 6.319874164465368 4.6191e-06 deg
node 119.838646688446 3.8416e-05 deg
peri 71.98625178485705 4.2278e-05 deg
M 325.4276903811958 2.0187e-05 deg
tp 2458745.376114875773
(2019-Sep-18.87611488)
8.5286e-05 TDB
period 1508.588865781488
4.13
1.1823e-05
3.237e-08
d
yr
n .2386336053285868 1.8702e-09 deg/d
Q 2.921732632195627 1.5265e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1710  
   data-arc span      15038 days (41.17 yr)  
   first obs. used      1978-03-06  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54031  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:33:48  

Additional Information
 Earth MOID = 1.23716 au 
 Jupiter MOID = 2.05794 au 
 T_jup = 3.407 
[ 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 14.2   n/a MPO474004  
diameter diameter 7.683 km 0.204 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 6.62 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:
[Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.]
geometric albedo albedo 0.075   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17944 (1999 JF7)          Discovered 1999-May-08 by CSS at Catalina
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 JF7 = 1978 EN5 = 1982 BQ3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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