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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 
[ show covariance matrix ]

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

[ 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
2014-Dec-15 08:40 < 00:01 Thisb 0.0123228454237075 0.0123214616769344 0.0123242291922634 4.51917161830103 4.51917149586622 2457006.861117773 0.462750530684613 105.070636191704 65.2087940305573 74.1695859871709 27602.3519680646 T 17 CATAB v2.0f-lin.ifort 2020-Nov-12 20:03:52 2020-Nov-12 20:03
2079-Oct-28 05:18 00:03 Psych 0.0167654012161634 0.0167630840541466 0.0167677313382191 4.56791144642437 4.5679112884373 2480699.720730222 2.74745129685 848.082482973568 56.2019610956336 83.1306902875819 44274.4810073461 T 17 CATAB v2.0f-lin.ifort 2020-Nov-12 20:03:52 2020-Nov-12 20:03

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