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100878 (1998 HJ90)
Classification: Main-belt Asteroid          SPK-ID: 2100878
[ 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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1644140807831707 4.4117e-08  
a 2.351677129415297 1.1552e-08 au
q 1.965028295883675 1.0304e-07 au
i 2.886176937777109 4.1324e-06 deg
node 134.2004376293523 9.3875e-05 deg
peri 98.25806217689384 9.4736e-05 deg
M 33.38120720659255 1.286e-05 deg
tp 2458878.358145961984
(2020-Jan-29.85814596)		 4.6815e-05 TDB
period 1317.240181924931
3.61		 9.7058e-06
2.657e-08		 d
yr
n .273298677750567 2.0137e-09 deg/d
Q 2.738325962946918 1.3451e-08 au
   Orbit Determination Parameters
   # obs. used (total)      315  
   data-arc span      9119 days (24.97 yr)  
   first obs. used      1995-07-27  
   last obs. used      2020-07-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62379  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:03:45  

Additional Information
 Earth MOID = .956665 au 
 Jupiter MOID = 2.2564 au 
 T_jup = 3.537 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457230.5 (2015-Jul-27.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1644797470447441 4.4092e-08  
q 1.96457793721563 1.0304e-07 au
tp 2457560.591930389353
(2016-Jun-21.09193039)		 4.5166e-05 TDB
node 134.2228476269682 9.3883e-05 deg
peri 98.03401101949831 9.4742e-05 deg
i 2.885863540406579 4.1327e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      315  
   data-arc span      9119 days (24.97 yr)  
   first obs. used      1995-07-27  
   last obs. used      2020-07-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62379  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:03:45  

Additional Information
 Jupiter MOID = 2.2564 au 
 T_jup = 3.537 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.944125260023782E-15 -4.523422292946097E-15 -3.890732259267465E-13 2.007699572662086E-14 -7.445372836901691E-14 -2.323678146592373E-15
q -4.523422292946097E-15 1.061725694012412E-14 9.44220015081872E-13 -4.688811864876435E-14 1.778099832482357E-13 5.493978287867585E-15
tp -3.890732259267465E-13 9.44220015081872E-13 2.039955597181306E-9 -6.324355846101207E-12 5.956473692237071E-10 1.342953688768936E-12
node 2.007699572662086E-14 -4.688811864876435E-14 -6.324355846101207E-12 8.814081276476264E-9 -8.803960162968063E-9 7.937822924363163E-11
peri -7.445372836901691E-14 1.778099832482357E-13 5.956473692237071E-10 -8.803960162968063E-9 8.976008456385264E-9 -7.893489943650111E-11
i -2.323678146592373E-15 5.493978287867585E-15 1.342953688768936E-12 7.937822924363163E-11 -7.893489943650111E-11 1.707894198012513E-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 17.2   n/a MPO422320  

100878 (1998 HJ90)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)		 Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1985-Feb-17 00:00 00:02 Psych 0.0238944722192982 0.0238928359263372 0.0238961085578254 3.87902341344597 3.87902328290905 2446113.499919927 2.377837316825 272.491070994054 79.8733576827133 -86.4195071105275 44629.0593835443 T 16 CATAB v2.0f-lin.ifort 2020-Nov-12 20:03:46 2020-Nov-12 20:03

Alternate Designations
 1998 HJ90 = 1995 OQ9 = 2002 OY18 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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