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74737 (1999 RK180)
Classification: Main-belt Asteroid          SPK-ID: 2074737
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1970180322657547 4.5667e-08  
a 2.223074513102093 7.379e-09 au
q 1.785088746950568 1.0155e-07 au
i 5.369977524192809 3.0815e-06 deg
node 103.3119342775992 6.1949e-05 deg
peri 236.7137617694121 6.3176e-05 deg
M 96.72546029331052 1.2723e-05 deg
tp 2458675.212210932149
(2019-Jul-10.71221093)
4.3059e-05 TDB
period 1210.680246021276
3.31
6.0278e-06
1.65e-08
d
yr
n .2973534929500068 1.4805e-09 deg/d
Q 2.661060279253618 8.8327e-09 au
  Orbit Determination Parameters
   # obs. used (total)      944  
   data-arc span      14777 days (40.46 yr)  
   first obs. used      1979-08-14  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51146  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 17:21:16  

Additional Information
 Earth MOID = .782868 au 
 Jupiter MOID = 2.73149 au 
 T_jup = 3.617 
[ 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 15.6   n/a MPO439563  
rotation period rot_per 5.30 h n/a LCDB (Rev. 2019-August); 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.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]

74737 (1999 RK180)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RK180 = 1979 PE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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