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17997 (1999 JN78)
Classification: Main-belt Asteroid          SPK-ID: 2017997
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1533982083185237 3.149e-08  
a 2.334908444166161 8.7806e-09 au
q 1.97673767224328 7.5297e-08 au
i 11.58400825867683 3.7438e-06 deg
node 128.6079072602365 1.7189e-05 deg
peri 56.16325875962125 2.1283e-05 deg
M 44.09357332228659 1.2619e-05 deg
tp 2459040.884153651051
(2020-Jul-10.38415365)
4.5563e-05 TDB
period 1303.176412254576
3.57
7.3511e-06
2.013e-08
d
yr
n .2762480939761469 1.5583e-09 deg/d
Q 2.693079216089042 1.0128e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1813  
   data-arc span      13815 days (37.82 yr)  
   first obs. used      1982-08-21  
   last obs. used      2020-06-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43675  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:19:22  

Additional Information
 Earth MOID = 1.00566 au 
 Jupiter MOID = 2.32142 au 
 T_jup = 3.525 
[ 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 14.59   n/a E2021B10  
diameter diameter 6.806 km 0.058 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.04678 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:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.080   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17997 (1999 JN78)          Discovered 1999-May-13 by LINEAR at Socorro
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 JN78 = 1988 CQ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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