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100870 (1998 HM78)
Classification: Main-belt Asteroid          SPK-ID: 2100870
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1499187884271122 3.6432e-08  
a 2.345295729797726 9.2259e-09 au
q 1.993691835483171 8.4556e-08 au
i 2.074299440857531 4.1653e-06 deg
node 353.4497851449541 0.00010351 deg
peri 187.6203711372925 0.00010429 deg
M 133.9215311130932 1.3843e-05 deg
tp 2458712.474234599405
(2019-Aug-16.97423460)
4.9287e-05 TDB
period 1311.88222001322
3.59
7.741e-06
2.119e-08
d
yr
n .2744148784914338 1.6192e-09 deg/d
Q 2.696899624112281 1.0609e-08 au
  Orbit Determination Parameters
   # obs. used (total)      800  
   data-arc span      8105 days (22.19 yr)  
   first obs. used      1998-04-21  
   last obs. used      2020-06-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54496  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:34:08  

Additional Information
 Earth MOID = .996138 au 
 Jupiter MOID = 2.26255 au 
 T_jup = 3.545 
[ 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 16.13   n/a E2021B55  

100870 (1998 HM78)          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
1934-Nov-18 18:11 00:05 Psych 0.049834707657583 0.0498294338541437 0.0498399833372354 4.00560474209046 4.00560468147923 2427760.257444234 4.609033557816 554.869359847144 44.4299419696798 -62.0849432783731 148270.149978301 T 19 CATAB v2.0f-lin.ifort 2021-Apr-13 15:34:10 2021-Apr-13 15:34

Alternate Designations
 1998 HM78 = 2003 UH311 = 2003 UL199 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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