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19468 (1998 HO45)
Classification: Main-belt Asteroid          SPK-ID: 2019468
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .130368956855733 3.9197e-08  
a 2.549649915491487 8.1288e-09 au
q 2.217254715661555 9.9944e-08 au
i 4.347643539266929 4.4996e-06 deg
node 329.6966921410361 3.6862e-05 deg
peri 324.2948635945538 3.9419e-05 deg
M 129.4531555765317 1.2695e-05 deg
tp 2458665.776344942909
(2019-Jul-01.27634494)
5.2225e-05 TDB
period 1487.028376892272
4.07
7.1114e-06
1.947e-08
d
yr
n .242093564315404 1.1578e-09 deg/d
Q 2.88204511532142 9.1885e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2018  
   data-arc span      9311 days (25.49 yr)  
   first obs. used      1995-08-17  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46647  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:54:27  

Additional Information
 Earth MOID = 1.20107 au 
 Jupiter MOID = 2.30424 au 
 T_jup = 3.425 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456942.5 (2014-Oct-12.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1306235315691601 3.9145e-08  
q 2.216146439097336 9.9914e-08 au
tp 2457180.954509006994
(2015-Jun-07.45450901)
5.2224e-05 TDB
node 329.7833035669227 3.6867e-05 deg
peri 324.7037396884209 3.9408e-05 deg
i 4.347903571127493 4.4991e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2018  
   data-arc span      9311 days (25.49 yr)  
   first obs. used      1995-08-17  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46647  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:54:27  

Additional Information
 Jupiter MOID = 2.30424 au 
 T_jup = 3.425 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.532356311569513E-15 -3.901253437591113E-15 7.314088502329845E-13 -6.307675852076906E-15 1.742700853083366E-13 -4.359982265796251E-16
q -3.901253437591113E-15 9.982890544649683E-15 -1.901372822908469E-12 1.659842586089723E-14 -4.575667724380046E-13 1.202959254670757E-15
tp 7.314088502329845E-13 -1.901372822908469E-12 2.727361555805901E-9 -6.660260424517757E-12 7.316822154528031E-10 -1.168300206311206E-12
node -6.307675852076906E-15 1.659842586089723E-14 -6.660260424517757E-12 1.359159589446083E-9 -1.356395758838322E-9 -2.144835312132566E-11
peri 1.742700853083366E-13 -4.575667724380046E-13 7.316822154528031E-10 -1.356395758838322E-9 1.552959499016123E-9 2.108465787880947E-11
i -4.359982265796251E-16 1.202959254670757E-15 -1.168300206311206E-12 -2.144835312132566E-11 2.108465787880947E-11 2.024229002049771E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.99   n/a E2021B10  
diameter diameter 4.464 km 0.189 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.293   0.054 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19468 (1998 HO45)          Discovered 1998-Apr-20 by LINEAR at Socorro
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 HO45 = 1995 QM4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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