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74030 (1998 HF21)
Classification: Main-belt Asteroid          SPK-ID: 2074030
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08318358401331562 3.917e-08  
a 2.295372277028598 1.0567e-08 au
q 2.104434984380554 9.2142e-08 au
i 7.376416310704286 4.8662e-06 deg
node 24.69965484130944 3.2063e-05 deg
peri 240.7287008180154 4.5824e-05 deg
M 68.72067875090822 3.1336e-05 deg
tp 2458758.027179393284
(2019-Oct-01.52717939)
0.00011077 TDB
period 1270.217596872383
3.48
8.7715e-06
2.402e-08
d
yr
n .2834160075300616 1.9571e-09 deg/d
Q 2.486309569676642 1.1446e-08 au
  Orbit Determination Parameters
   # obs. used (total)      801  
   data-arc span      8156 days (22.33 yr)  
   first obs. used      1998-03-31  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52231  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 07:09:55  

Additional Information
 Earth MOID = 1.10068 au 
 Jupiter MOID = 2.56437 au 
 T_jup = 3.580 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456817.5 (2014-Jun-09.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08337042467307643 3.9262e-08  
q 2.104156467632659 9.2254e-08 au
tp 2456216.401610297680
(2012-Oct-15.90161030)
0.00011386 TDB
node 24.80217733053201 3.2066e-05 deg
peri 240.5545656181654 4.57e-05 deg
i 7.376566158364807 4.8646e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      801  
   data-arc span      8156 days (22.33 yr)  
   first obs. used      1998-03-31  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52231  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 07:09:55  

Additional Information
 Jupiter MOID = 2.56437 au 
 T_jup = 3.580 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.541503192858803E-15 -3.602991220663859E-15 -7.806530664985849E-15 1.282827512361351E-14 4.811097157820785E-14 4.365841822202363E-17
q -3.602991220663859E-15 8.510820109744692E-15 -2.791711138020884E-13 -3.010715181790033E-14 -1.867468858932288E-13 2.645377308910947E-17
tp -7.806530664985849E-15 -2.791711138020884E-13 1.296362389724357E-8 -4.339547333053206E-11 3.717302419400928E-9 9.129084437454237E-12
node 1.282827512361351E-14 -3.010715181790033E-14 -4.339547333053206E-11 1.028199322957306E-9 -1.030861053908141E-9 -3.591422560079809E-11
peri 4.811097157820785E-14 -1.867468858932288E-13 3.717302419400928E-9 -1.030861053908141E-9 2.088493337241763E-9 3.816652465777085E-11
i 4.365841822202363E-17 2.645377308910947E-17 9.129084437454237E-12 -3.591422560079809E-11 3.816652465777085E-11 2.366466101857337E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.9   n/a MPO337816  

74030 (1998 HF21)          Discovered 1998-Apr-20 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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