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JPL Small-Body Database Browser
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74021 (1998 HP1)
Classification: Main-belt Asteroid          SPK-ID: 2074021
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1268770778309709 4.3333e-08  
a 2.348429199614493 1.1933e-08 au
q 2.05046736527448 1.0482e-07 au
i 5.344150192869122 4.6983e-06 deg
node 54.69567213490543 4.9929e-05 deg
peri 192.3762731888301 5.3538e-05 deg
M 276.1568474562474 2.0305e-05 deg
tp 2458906.646806224294
(2020-Feb-27.14680622)
7.4992e-05 TDB
period 1314.512239782878
3.60
1.0019e-05
2.743e-08
d
yr
n .273865840959733 2.0874e-09 deg/d
Q 2.646391033954505 1.3447e-08 au
  Orbit Determination Parameters
   # obs. used (total)      473  
   data-arc span      7655 days (20.96 yr)  
   first obs. used      1998-04-19  
   last obs. used      2019-04-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60685  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 08:02:22  

Additional Information
 Earth MOID = 1.03714 au 
 Jupiter MOID = 2.37058 au 
 T_jup = 3.543 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.4   n/a MPO432293  

74021 (1998 HP1)          Discovered 1998-Apr-19 by Stroncone at Stroncone
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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