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18354 (1990 RK5)
Classification: Main-belt Asteroid          SPK-ID: 2018354
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2675265021473405 3.9905e-08  
a 2.863503812731335 9.9262e-09 au
q 2.097440653825748 1.1437e-07 au
i 4.694367000030449 3.8414e-06 deg
node 207.6752182568171 5.0224e-05 deg
peri 119.7844806919139 5.0688e-05 deg
M 63.79479835055433 5.6003e-06 deg
tp 2458686.862600938131
(2019-Jul-22.36260094)
2.7358e-05 TDB
period 1769.88510946977
4.85
9.2028e-06
2.52e-08
d
yr
n .2034030333798618 1.0576e-09 deg/d
Q 3.629566971636922 1.2582e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1345  
   data-arc span      12567 days (34.41 yr)  
   first obs. used      1985-09-07  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50913  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:24:05  

Additional Information
 Earth MOID = 1.09106 au 
 Jupiter MOID = 1.7781 au 
 T_jup = 3.242 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456793.5 (2014-May-16.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2704527535276798 3.988e-08  
q 2.087446284695246 1.1465e-07 au
tp 2456919.489868042855
(2014-Sep-18.98986804)
2.7796e-05 TDB
node 207.7258195542901 5.0237e-05 deg
peri 119.9749657096792 5.0686e-05 deg
i 4.69505636126442 3.8478e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1345  
   data-arc span      12567 days (34.41 yr)  
   first obs. used      1985-09-07  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50913  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:24:05  

Additional Information
 Jupiter MOID = 1.7781 au 
 T_jup = 3.242 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.590437148161673E-15 -4.562770352411948E-15 1.448462901119717E-13 2.963972225857418E-15 4.310355941819179E-14 -4.362760471287689E-15
q -4.562770352411948E-15 1.314406345484836E-14 -4.761622378255976E-13 -8.638451301852277E-15 -1.391770540401423E-13 1.269418743953704E-14
tp 1.448462901119717E-13 -4.761622378255976E-13 7.726015836622178E-10 2.205370964693484E-12 2.061441118038008E-10 -4.946281190799856E-13
node 2.963972225857418E-15 -8.638451301852277E-15 2.205370964693484E-12 2.523798856451755E-9 -2.514542520131074E-9 -6.63175039943797E-11
peri 4.310355941819179E-14 -1.391770540401423E-13 2.061441118038008E-10 -2.514542520131074E-9 2.5691126619242E-9 6.596419550572189E-11
i -4.362760471287689E-15 1.269418743953704E-14 -4.946281190799856E-13 -6.63175039943797E-11 6.596419550572189E-11 1.480579699233555E-11

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 14.3   n/a MPO502308  
diameter diameter 7.100 km 2.255 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.041   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

18354 (1990 RK5)          Discovered 1990-Sep-15 by Holt, H. E. at Palomar
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 RK5 = 1995 UT5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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