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437841 (1998 HD14)
Classification: Aten [NEO, PHA]          SPK-ID: 2437841
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 53 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3125638855368801 5.8706e-08  
a .9630169299883989 7.4789e-09 au
q .6620126165134272 5.749e-08 au
i 7.810313592910713 3.7587e-06 deg
node 183.8128536124727 5.7523e-05 deg
peri 260.8647833309823 4.1634e-05 deg
M 226.1143748500236 4.2213e-05 deg
tp 2459128.875089714976
(2020-Oct-06.37508971)
4.0914e-05 TDB
period 345.1829294266805
0.95
4.0211e-06
1.101e-08
d
yr
n 1.042925270371653 1.2149e-08 deg/d
Q 1.264021243463371 9.8165e-09 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -4.9028292966006E-14 1.044E-14
ALN [SET] 1. n/a
NK [SET] 0. n/a
NM [SET] 2. n/a
R0 [SET] 1. n/a
  Orbit Determination Parameters
   # obs. used (total)      207  
   data-arc span      7735 days (21.18 yr)  
   first obs. used      1998-04-25  
   last obs. used      2019-06-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45977  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-01 06:03:27  

Additional Information
 Earth MOID = .0342703 au 
 Jupiter MOID = 3.94854 au 
 T_jup = 6.213 
 Nongravitational accels. using nonstandard g(r) = (1 au/ r)^2 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457501.5 (2016-Apr-23.0) TDB
Reference: JPL 53 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .312732126422495 5.8518e-08  
q .6620327369057099 5.7482e-08 au
tp 2457402.598111229719
(2016-Jan-15.09811123)
3.8423e-05 TDB
node 183.8986142415121 5.7531e-05 deg
peri 260.8140484879553 4.1702e-05 deg
i 7.808432031652676 3.7613e-06 deg

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -4.9028292966006E-14 1.044E-14
ALN [SET] 1. n/a
NK [SET] 0. n/a
NM [SET] 2. n/a
R0 [SET] 1. n/a
  Orbit Determination Parameters
   # obs. used (total)      207  
   data-arc span      7735 days (21.18 yr)  
   first obs. used      1998-04-25  
   last obs. used      2019-06-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45977  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-01 06:03:27  

Additional Information
 Jupiter MOID = 3.94854 au 
 T_jup = 6.213 
 Nongravitational accels. using nonstandard g(r) = (1 au/ r)^2 
Orbit Covariance (7×7)
  e q tp node peri i A2
e 3.424348868552983E-15 -3.353813967102279E-15 -5.832194066806526E-13 -1.151855778647809E-12 7.239679029421892E-13 3.830336550065671E-14 2.034189930664625E-23
q -3.353813967102279E-15 3.304130931315826E-15 5.463531000565929E-13 1.11141183528365E-12 -6.966497785119692E-13 -3.709231892191208E-14 1.270000387271669E-23
tp -5.832194066806526E-13 5.463531000565929E-13 1.476323860285893E-9 1.725169606705395E-9 -8.459166928071965E-10 2.651340890164067E-11 2.004333796735702E-19
node -1.151855778647809E-12 1.11141183528365E-12 1.725169606705395E-9 3.309833074517884E-9 -2.255780356750494E-9 1.037256203517945E-10 3.110048132587693E-19
peri 7.239679029421892E-13 -6.966497785119692E-13 -8.459166928071965E-10 -2.255780356750494E-9 1.739082274644692E-9 -8.742369854663633E-11 -1.742423352380719E-19
i 3.830336550065671E-14 -3.709231892191208E-14 2.651340890164067E-11 1.037256203517945E-10 -8.742369854663633E-11 1.414749821488246E-11 8.903604303026194E-21
A2 2.034189930664625E-23 1.270000387271669E-23 2.004333796735702E-19 3.110048132587693E-19 -1.742423352380719E-19 8.903604303026194E-21 1.090503292977472E-28

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 21.0   n/a MPO413509  

437841 (1998 HD14)          Discovered 1998-Apr-25 by NEAT at Haleakala
Reference: Last Updated: 2015-07-06

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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