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100863 (1998 HQ54)
Classification: Main-belt Asteroid          SPK-ID: 2100863
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1375549390525396 4.5904e-08  
a 2.370131934892503 1.1288e-08 au
q 2.044108581041887 1.0499e-07 au
i 4.783203144635703 4.5367e-06 deg
node 339.7880710793643 4.6287e-05 deg
peri 217.5080876388123 4.8923e-05 deg
M 27.70735981051082 1.3799e-05 deg
tp 2458897.923033024733
(2020-Feb-18.42303302)
5.1294e-05 TDB
period 1332.776141921956
3.65
9.5213e-06
2.607e-08
d
yr
n .2701128784319735 1.9297e-09 deg/d
Q 2.696155288743119 1.2841e-08 au
  Orbit Determination Parameters
   # obs. used (total)      545  
   data-arc span      8604 days (23.56 yr)  
   first obs. used      1996-12-02  
   last obs. used      2020-06-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58359  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:03:50  

Additional Information
 Earth MOID = 1.04518 au 
 Jupiter MOID = 2.27354 au 
 T_jup = 3.528 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457375.5 (2015-Dec-19.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1382824359496037 4.5874e-08  
q 2.042594564922482 1.0511e-07 au
tp 2457564.581570989078
(2016-Jun-25.08157099)
5.4447e-05 TDB
node 339.8151139654435 4.6263e-05 deg
peri 217.3912925873931 4.8872e-05 deg
i 4.78492139452827 4.5375e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      545  
   data-arc span      8604 days (23.56 yr)  
   first obs. used      1996-12-02  
   last obs. used      2020-06-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58359  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:03:50  

Additional Information
 Jupiter MOID = 2.27354 au 
 T_jup = 3.528 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.104419712909384E-15 -4.804946662856381E-15 -6.856923275434553E-13 -3.228388862273504E-15 -2.086977430218553E-13 -3.730586044124382E-15
q -4.804946662856381E-15 1.104857036362664E-14 1.393858011416551E-12 6.970352965656184E-15 4.264347174815618E-13 8.914149943426451E-15
tp -6.856923275434553E-13 1.393858011416551E-12 2.964439271664083E-9 8.155506437756001E-12 8.696897932406338E-10 -7.839019976599298E-13
node -3.228388862273504E-15 6.970352965656184E-15 8.155506437756001E-12 2.140267237987791E-9 -2.130065932976253E-9 4.520791821655018E-11
peri -2.086977430218553E-13 4.264347174815618E-13 8.696897932406338E-10 -2.130065932976253E-9 2.388495883429836E-9 -4.527863037355922E-11
i -3.730586044124382E-15 8.914149943426451E-15 -7.839019976599298E-13 4.520791821655018E-11 -4.527863037355922E-11 2.058860062508159E-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 16.3   n/a MPO426633  

100863 (1998 HQ54)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1998 HQ54 = 1999 RC170 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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