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192491 (1998 HU27)
Classification: Main-belt Asteroid          SPK-ID: 2192491
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0364754191225251 5.7865e-08  
a 2.587825451756216 1.6115e-08 au
q 2.49343343378747 1.4037e-07 au
i 2.379081752669699 3.8922e-06 deg
node 307.6978802403769 0.00010494 deg
peri 275.4861838572936 0.00012318 deg
M 180.415703312571 6.2838e-05 deg
tp 2460155.019507073134
(2023-Jul-29.51950707)
0.00026421 TDB
period 1520.550669425223
4.16
1.4203e-05
3.889e-08
d
yr
n .2367563325831701 2.2115e-09 deg/d
Q 2.682217469724962 1.6703e-08 au
  Orbit Determination Parameters
   # obs. used (total)      592  
   data-arc span      8270 days (22.64 yr)  
   first obs. used      1998-03-29  
   last obs. used      2020-11-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54493  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 22:16:19  

Additional Information
 Earth MOID = 1.48577 au 
 Jupiter MOID = 2.29127 au 
 T_jup = 3.419 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457771.5 (2017-Jan-18.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03490081398359819 5.7489e-08  
q 2.498874865168477 1.3904e-07 au
tp 2457118.164448529681
(2015-Apr-05.66444853)
0.00028719 TDB
node 307.763052027514 0.00010508 deg
peri 276.8423651698568 0.00012539 deg
i 2.376900563056226 3.8884e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      592  
   data-arc span      8270 days (22.64 yr)  
   first obs. used      1998-03-29  
   last obs. used      2020-11-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54493  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 22:16:19  

Additional Information
 Jupiter MOID = 2.29127 au 
 T_jup = 3.419 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.305011739044088E-15 -7.963093733485086E-15 -8.839612903190755E-12 -6.037770724529142E-14 -2.112489237318385E-12 -1.842272302225314E-15
q -7.963093733485086E-15 1.933082559080439E-14 2.154357392141539E-11 1.453086776632342E-13 5.161009435764978E-12 4.493843311968767E-15
tp -8.839612903190755E-12 2.154357392141539E-11 8.247641933802197E-8 2.638750965000884E-10 1.96682201756952E-8 4.194667857776919E-12
node -6.037770724529142E-14 1.453086776632342E-13 2.638750965000884E-10 1.104281425042507E-8 -1.096899266010422E-8 1.183265440958912E-10
peri -2.112489237318385E-12 5.161009435764978E-12 1.96682201756952E-8 -1.096899266010422E-8 1.572185017503418E-8 -1.172093749183125E-10
i -1.842272302225314E-15 4.493843311968767E-15 4.194667857776919E-12 1.183265440958912E-10 -1.172093749183125E-10 1.511932214436402E-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 16.07   n/a E2021B55  

192491 (1998 HU27)          Discovered 1998-Apr-22 by Spacewatch at Kitt Peak
Reference: 20081113/Numbers.arcLast Updated: 2008-11-17

[ show close-approach data ]
Alternate Designations
 1998 HU27 = 2002 CB241 = 2002 EX53 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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