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91112 (1998 HJ52)
Classification: Main-belt Asteroid          SPK-ID: 2091112
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1654526510563172 3.325e-08  
a 2.569063474056433 1.126e-08 au
q 2.144005111541844 8.4929e-08 au
i 7.760688686888701 5.2764e-06 deg
node 32.75301122365458 3.8818e-05 deg
peri 60.6359494525904 4.461e-05 deg
M 235.9223319534435 2.1753e-05 deg
tp 2459518.884253093870
(2021-Oct-31.38425309)
9.148e-05 TDB
period 1504.044475140925
4.12
9.8883e-06
2.707e-08
d
yr
n .2393546241152669 1.5736e-09 deg/d
Q 2.994121836571022 1.3123e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1317  
   data-arc span      8138 days (22.28 yr)  
   first obs. used      1998-04-21  
   last obs. used      2020-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53171  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 08:15:33  

Additional Information
 Earth MOID = 1.17279 au 
 Jupiter MOID = 2.24063 au 
 T_jup = 3.399 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456613.5 (2013-Nov-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1662410774123979 3.2598e-08  
q 2.141604876311522 8.3097e-08 au
tp 2456507.208782036555
(2013-Aug-02.70878204)
8.8218e-05 TDB
node 32.95126972295915 3.8684e-05 deg
peri 59.66053632831873 4.4545e-05 deg
i 7.777552920644943 5.2814e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1317  
   data-arc span      8138 days (22.28 yr)  
   first obs. used      1998-04-21  
   last obs. used      2020-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53171  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 08:15:33  

Additional Information
 Jupiter MOID = 2.24063 au 
 T_jup = 3.399 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.062621476146954E-15 -2.69264073360636E-15 1.130893601292281E-12 6.913859689036968E-15 2.750072120410442E-13 -2.915166411634475E-15
q -2.69264073360636E-15 6.905121025599767E-15 -2.850015081001082E-12 -1.71343711245455E-14 -6.934361243888146E-13 7.494955331919976E-15
tp 1.130893601292281E-12 -2.850015081001082E-12 7.782366455674737E-9 3.65132975102103E-11 1.983802471624492E-9 -1.276461021567E-11
node 6.913859689036968E-15 -1.71343711245455E-14 3.65132975102103E-11 1.496424979271374E-9 -1.473035343740177E-9 -1.182630461448324E-10
peri 2.750072120410442E-13 -6.934361243888146E-13 1.983802471624492E-9 -1.473035343740177E-9 1.984225292616397E-9 1.139565998380221E-10
i -2.915166411634475E-15 7.494955331919976E-15 -1.276461021567E-11 -1.182630461448324E-10 1.139565998380221E-10 2.789315055688569E-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 14.2   n/a MPO299529  
diameter diameter 3.601 km 0.876 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.312   0.115 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91112 (1998 HJ52)          Discovered 1998-Apr-25 by Zoltowski, F. B. at Woomera
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ 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
1920-May-09 23:27 00:03 Iris 0.0496144185255567 0.0496079709729176 0.0496208676067203 4.34320384512433 4.34320381844622 2422454.477211436 2.96861984415754 546.844611879319 62.3448557959763 -54.5267815250109 97226.9584336616 T 28 CATAB v2.0f-lin.ifort 2020-Aug-25 08:15:47 2020-Aug-25 08:15

Alternate Designations
 1998 HJ52 = 2000 RZ49 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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