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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08307432719525192 3.1669e-08  
a 2.295258231385946 8.8564e-09 au
q 2.104581198074195 7.1435e-08 au
i 7.376513455787638 4.7971e-06 deg
node 24.69884963799542 2.6883e-05 deg
peri 240.68760424 4.0569e-05 deg
M 125.4618527179237 3.0346e-05 deg
tp 2458757.855621641427
(2019-Oct-01.35562164)
0.00010701 TDB
period 1270.122931847324
3.48
7.3512e-06
2.013e-08
d
yr
n .2834371311416288 1.6405e-09 deg/d
Q 2.485935264697697 9.5921e-09 au
  Orbit Determination Parameters
   # obs. used (total)      981  
   data-arc span      8352 days (22.87 yr)  
   first obs. used      1998-03-31  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .497  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 13:10:37  

Additional Information
 Earth MOID = 1.09916 au 
 Jupiter MOID = 2.56342 au 
 T_jup = 3.580 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457297.5 (2015-Oct-02.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0825971647411069 3.1639e-08  
q 2.105955496215991 7.134e-08 au
tp 2457488.360681458119
(2016-Apr-09.86068146)
0.00010805 TDB
node 24.74277921099835 2.6868e-05 deg
peri 240.96175749184 4.0705e-05 deg
i 7.378597565693635 4.7978e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      981  
   data-arc span      8352 days (22.87 yr)  
   first obs. used      1998-03-31  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .497  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 13:10:37  

Additional Information
 Jupiter MOID = 2.56342 au 
 T_jup = 3.580 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.001053968379447E-15 -2.243010998432063E-15 -8.168473680469922E-13 7.017069899129379E-15 -2.231438420607745E-13 1.217450811860169E-16
q -2.243010998432063E-15 5.089442312155686E-15 1.816956455452844E-12 -1.642811815054599E-14 4.9345900551272E-13 -9.616838864392443E-17
tp -8.168473680469922E-13 1.816956455452844E-12 1.167384689604438E-8 -3.434649818898394E-11 3.312567436805348E-9 7.064813906181139E-12
node 7.017069899129379E-15 -1.642811815054599E-14 -3.434649818898394E-11 7.218875977283944E-10 -7.248961200690653E-10 -2.594966612623135E-11
peri -2.231438420607745E-13 4.9345900551272E-13 3.312567436805348E-9 -7.248961200690653E-10 1.656867130308875E-9 2.766301038030535E-11
i 1.217450811860169E-16 -9.616838864392443E-17 7.064813906181139E-12 -2.594966612623135E-11 2.766301038030535E-11 2.301894061286301E-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 15.99   n/a E2021B10  

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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