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74028 (1998 HR18)
Classification: Main-belt Asteroid          SPK-ID: 2074028
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2142484204379299 3.8901e-08  
a 2.390499036953164 1.0594e-08 au
q 1.878338394227556 9.1843e-08 au
i 4.386413113901758 4.966e-06 deg
node 349.8641635929929 5.7904e-05 deg
peri 276.9325855696712 5.9058e-05 deg
M 200.9307963446113 1.1506e-05 deg
tp 2459197.006104628465
(2020-Dec-13.50610463)
4.4433e-05 TDB
period 1349.992284688053
3.70
8.9737e-06
2.457e-08
d
yr
n .2666681906876129 1.7726e-09 deg/d
Q 2.902659679678771 1.2863e-08 au
  Orbit Determination Parameters
   # obs. used (total)      698  
   data-arc span      9093 days (24.90 yr)  
   first obs. used      1994-02-15  
   last obs. used      2019-01-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5463  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 05:31:07  

Additional Information
 Earth MOID = .86833 au 
 Jupiter MOID = 2.21439 au 
 T_jup = 3.497 
[ 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 15.9   n/a MPO426448  
diameter diameter 3.908 km 0.151 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.055   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74028 (1998 HR18)          Discovered 1998-Apr-18 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HR18 = 1994 CW7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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