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162082 (1998 HL1)
Classification: Apollo [NEO, PHA]          SPK-ID: 2162082
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 152 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1870614490592767 8.6323e-09  
a 1.246321031460719 2.1499e-09 au
q 1.013182413322625 9.8591e-09 au
i 20.05175737351135 3.8895e-06 deg
node 213.5418856548297 8.0744e-07 deg
peri 148.6394446407556 6.306e-06 deg
M 316.4912829740416 3.563e-06 deg
tp 2459261.921029115352
(2021-Feb-16.42102912)
4.9936e-06 TDB
period 508.2101241536149
1.39
1.315e-06
3.6e-09
d
yr
n .7083684147370194 1.8329e-09 deg/d
Q 1.479459649598814 2.5521e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1391  
   # delay obs. used      3  
   # Doppler obs. used      1  
   data-arc span      7977 days (21.84 yr)  
   first obs. used      1998-04-18  
   last obs. used      2020-02-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .36549  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-26 06:19:15  

Additional Information
 Earth MOID = .0410542 au 
 Jupiter MOID = 3.9269 au 
 T_jup = 5.078 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458117.5 (2017-Dec-30.0) TDB
Reference: JPL 152 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1871773310538238 8.663e-09  
q 1.013016309507048 9.8536e-09 au
tp 2458245.462228546215
(2018-May-06.96222855)
6.1251e-06 TDB
node 213.5689300796712 8.1066e-07 deg
peri 148.5192017224976 6.2919e-06 deg
i 20.04867434756353 3.8918e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1391  
   # delay obs. used      3  
   # Doppler obs. used      1  
   data-arc span      7977 days (21.84 yr)  
   first obs. used      1998-04-18  
   last obs. used      2020-02-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .36549  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-26 06:19:15  

Additional Information
 Jupiter MOID = 3.9269 au 
 T_jup = 5.078 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.50479318302667E-17 -8.451964060878589E-17 -5.293892002721147E-14 3.631613586837977E-15 -5.369444644042051E-14 -2.853363460149545E-15
q -8.451964060878589E-17 9.709317125412501E-17 5.934024424895344E-14 -4.214226538489991E-15 6.172831911982984E-14 3.193008330372544E-15
tp -5.293892002721147E-14 5.934024424895344E-14 3.751636572579531E-11 -2.343405757735617E-12 3.770302101515438E-11 1.888377577699108E-12
node 3.631613586837977E-15 -4.214226538489991E-15 -2.343405757735617E-12 6.571668830496827E-13 -2.778827588275361E-12 -1.29787380124309E-12
peri -5.369444644042051E-14 6.172831911982984E-14 3.770302101515438E-11 -2.778827588275361E-12 3.958764186224921E-11 3.045411353640441E-12
i -2.853363460149545E-15 3.193008330372544E-15 1.888377577699108E-12 -1.29787380124309E-12 3.045411353640441E-12 1.514582866434426E-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 19.1   n/a E2021-HD6  
rotation period rot_per 11.7864 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2019) http://www.asu.cas.cz/~ppravec/neo.htm]
[Franco, L.; Marchini, A.; Scarfi, G.; Bacci, P.; et al. (2020) Minor Planet Bull. 47, 144-147.]
[Warner, B.D.; Stephens, R.D. (2020) Minor Planet Bull. 47, 105-120.]

162082 (1998 HL1)          Discovered 1998-Apr-18 by LINEAR at Socorro
Reference: 20070926/Numbers.arcLast Updated: 2007-09-30

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