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JPL Small-Body Database Browser
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12516 (1998 HB45)
Classification: Main-belt Asteroid          SPK-ID: 2012516
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07812204785180969 2.9183e-08  
a 2.193834219324239 6.8891e-09 au
q 2.022447397463253 6.3789e-08 au
i 4.886548258427496 4.2522e-06 deg
node 13.3877331527517 4.0609e-05 deg
peri 254.1430437874578 5.0741e-05 deg
M 236.4114390869445 3.0646e-05 deg
tp 2459407.955243272769
(2021-Jul-12.45524327)
0.00010098 TDB
period 1186.87268865756
3.25
5.5906e-06
1.531e-08
d
yr
n .3033181262323816 1.4287e-09 deg/d
Q 2.365221041185224 7.4273e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1785  
   data-arc span      11087 days (30.35 yr)  
   first obs. used      1989-09-25  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51237  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:22:20  

Additional Information
 Earth MOID = 1.01333 au 
 Jupiter MOID = 2.68356 au 
 T_jup = 3.662 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456387.5 (2013-Apr-05.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07792584173402034 2.9067e-08  
q 2.023518688924784 6.3469e-08 au
tp 2455846.017907328397
(2011-Oct-11.51790733)
0.00010319 TDB
node 13.47734214378093 4.058e-05 deg
peri 253.7544290955284 5.0808e-05 deg
i 4.888548692132235 4.2522e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1785  
   data-arc span      11087 days (30.35 yr)  
   first obs. used      1989-09-25  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51237  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:22:20  

Additional Information
 Jupiter MOID = 2.68356 au 
 T_jup = 3.662 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.449009089184438E-16 -1.83571613869705E-15 6.389307184468079E-13 -2.81524723715032E-15 1.885088412729826E-13 7.01174597208971E-17
q -1.83571613869705E-15 4.02825400780286E-15 -1.512358227077668E-12 6.85853222354097E-15 -4.422238493648102E-13 -1.706942268682597E-16
tp 6.389307184468079E-13 -1.512358227077668E-12 1.064915354525309E-8 -1.508319846524237E-13 3.164118870153797E-9 -2.029390305677579E-12
node -2.81524723715032E-15 6.85853222354097E-15 -1.508319846524237E-13 1.646755414663233E-9 -1.640263444864809E-9 -5.022200610566599E-11
peri 1.885088412729826E-13 -4.422238493648102E-13 3.164118870153797E-9 -1.640263444864809E-9 2.581451961373453E-9 4.942491643798524E-11
i 7.01174597208971E-17 -1.706942268682597E-16 -2.029390305677579E-12 -5.022200610566599E-11 4.942491643798524E-11 1.808112480501422E-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 14.8   n/a MPO347624  
diameter diameter 2.890 km 0.234 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.306   0.044 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

12516 (1998 HB45)          Discovered 1998-Apr-20 by LINEAR at Socorro
Reference: 19991123/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HB45 = 1989 SP8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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