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74618 (1999 RQ23)
Classification: Main-belt Asteroid          SPK-ID: 2074618
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 .212909889027998 2.9454e-08  
a 2.392240799256411 1.0004e-08 au
q 1.882909076158479 7.1816e-08 au
i 4.61768437790994 3.6161e-06 deg
node 142.1079796977106 5.3933e-05 deg
peri 160.01225304718 5.5013e-05 deg
M 251.38152869797 1.3189e-05 deg
tp 2459408.262188723036
(2021-Jul-12.76218872)
5.0885e-05 TDB
period 1351.467997851941
3.70
8.4779e-06
2.321e-08
d
yr
n .2663770067601996 1.671e-09 deg/d
Q 2.901572522354342 1.2135e-08 au
  Orbit Determination Parameters
   # obs. used (total)      978  
   data-arc span      10520 days (28.80 yr)  
   first obs. used      1991-04-14  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55416  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 17:19:41  

Additional Information
 Earth MOID = .868375 au 
 Jupiter MOID = 2.34198 au 
 T_jup = 3.496 
[ 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 15.5   n/a MPO417341  
diameter diameter 1.238 km 0.228 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.605   0.218 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74618 (1999 RQ23)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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