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118270 (1998 HN129)
Classification: Main-belt Asteroid          SPK-ID: 2118270
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1620890574994295 5.5919e-08  
a 2.79509259853767 1.9926e-08 au
q 2.342038673617067 1.5521e-07 au
i 7.682181226730725 7.2427e-06 deg
node 205.6305344360717 3.3399e-05 deg
peri 327.9220375401864 3.8249e-05 deg
M 277.2728661197014 1.9991e-05 deg
tp 2459392.727648861526
(2021-Jun-27.22764886)
9.7159e-05 TDB
period 1706.839666347688
4.67
1.8252e-05
4.997e-08
d
yr
n .2109161200655311 2.2554e-09 deg/d
Q 3.248146523458272 2.3155e-08 au
  Orbit Determination Parameters
   # obs. used (total)      444  
   data-arc span      8274 days (22.65 yr)  
   first obs. used      1998-03-22  
   last obs. used      2020-11-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55388  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:45:07  

Additional Information
 Earth MOID = 1.35055 au 
 Jupiter MOID = 1.74345 au 
 T_jup = 3.295 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457172.5 (2015-May-30.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1623807696619032 5.6215e-08  
q 2.34028073059319 1.5602e-07 au
tp 2457688.530143096657
(2016-Oct-27.03014310)
8.7013e-05 TDB
node 205.6439804508162 3.3407e-05 deg
peri 328.3756844496373 3.8168e-05 deg
i 7.681421435442845 7.2433e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      444  
   data-arc span      8274 days (22.65 yr)  
   first obs. used      1998-03-22  
   last obs. used      2020-11-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55388  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:45:07  

Additional Information
 Jupiter MOID = 1.74345 au 
 T_jup = 3.295 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.160160196958931E-15 -8.721461473494643E-15 2.129720445850588E-12 -1.289352294832143E-14 4.790040634286723E-13 -2.977934308753788E-15
q -8.721461473494643E-15 2.434293893827415E-14 -5.335296959288835E-12 3.909521890059852E-14 -1.233699259205925E-12 1.026535027052531E-14
tp 2.129720445850588E-12 -5.335296959288835E-12 7.571331012986129E-9 -1.192684986034366E-11 1.614235146139817E-9 8.568584004389751E-13
node -1.289352294832143E-14 3.909521890059852E-14 -1.192684986034366E-11 1.116050230403328E-9 -1.108168143515303E-9 7.108378176983522E-12
peri 4.790040634286723E-13 -1.233699259205925E-12 1.614235146139817E-9 -1.108168143515303E-9 1.45678556035139E-9 -6.953327781868875E-12
i -2.977934308753788E-15 1.026535027052531E-14 8.568584004389751E-13 7.108378176983522E-12 -6.953327781868875E-12 5.246552526594598E-11

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 15.4   n/a MPO493675  

118270 (1998 HN129)          Discovered 1998-Apr-19 by LINEAR at Socorro
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ show close-approach data ]
Alternate Designations
 1998 HN129 = 2003 JL6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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