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18033 (1999 NR4)
Classification: Main-belt Asteroid          SPK-ID: 2018033
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1147979570416777 4.3831e-08  
a 2.989555254056136 1.6145e-08 au
q 2.646360418427278 1.3752e-07 au
i 9.079221374787915 3.585e-06 deg
node 286.512402691308 2.594e-05 deg
peri 48.65268026767379 3.229e-05 deg
M 24.75059781524611 1.6841e-05 deg
tp 2459070.694977680052
(2020-Aug-09.19497768)
8.8801e-05 TDB
period 1888.02744822577
5.17
1.5294e-05
4.187e-08
d
yr
n .1906751940170688 1.5446e-09 deg/d
Q 3.332750089684994 1.7998e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2078  
   data-arc span      13261 days (36.31 yr)  
   first obs. used      1984-10-20  
   last obs. used      2021-02-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44413  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:20:28  

Additional Information
 Earth MOID = 1.64429 au 
 Jupiter MOID = 2.01457 au 
 T_jup = 3.228 
[ 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 13.40   n/a E2021B10  
rotation period rot_per 16.2915 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.]

18033 (1999 NR4)          Discovered 1999-Jul-14 by Stafford, T. at Zeno
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 NR4 = 1984 UZ3 = 1998 FA126 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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