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18393 (1992 QB)
Classification: Main-belt Asteroid          SPK-ID: 2018393
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2263389638541826 3.2517e-08  
a 2.369604269773645 8.3138e-09 au
q 1.833270494608631 7.7388e-08 au
i 24.11508900922557 5.2268e-06 deg
node 55.59183542677283 8.7955e-06 deg
peri 243.6398819844183 1.4906e-05 deg
M 332.1126436425033 1.2205e-05 deg
tp 2459499.708866410824
(2021-Oct-12.20886641)
4.5179e-05 TDB
period 1332.331090534095
3.65
7.0118e-06
1.92e-08
d
yr
n .2702031068386205 1.422e-09 deg/d
Q 2.905938044938659 1.0196e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1580  
   data-arc span      17110 days (46.84 yr)  
   first obs. used      1974-08-22  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46483  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:36:51  

Additional Information
 Earth MOID = .919255 au 
 Jupiter MOID = 2.44648 au 
 T_jup = 3.396 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457583.5 (2016-Jul-14.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2266003817521611 3.2497e-08  
q 1.832732053099872 7.7406e-08 au
tp 2458166.203922141657
(2018-Feb-16.70392214)
4.5428e-05 TDB
node 55.63863774848844 8.8005e-06 deg
peri 243.4870043064754 1.4889e-05 deg
i 24.10851822389235 5.2257e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1580  
   data-arc span      17110 days (46.84 yr)  
   first obs. used      1974-08-22  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46483  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:36:51  

Additional Information
 Jupiter MOID = 2.44648 au 
 T_jup = 3.396 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.056061687442478E-15 -2.506789750566412E-15 -4.904514852866919E-13 -1.235593245025576E-15 -1.078216076323745E-13 3.005949432525146E-15
q -2.506789750566412E-15 5.991653429366103E-15 1.129483351574136E-12 2.776395920571048E-15 2.42861801852898E-13 -7.093440876576987E-15
tp -4.904514852866919E-13 1.129483351574136E-12 2.063672840932664E-9 -1.4953030332574E-12 5.534496503702012E-10 3.537342293022303E-12
node -1.235593245025576E-15 2.776395920571048E-15 -1.4953030332574E-12 7.744812471632126E-11 -7.05678170807893E-11 -7.64672491218578E-12
peri -1.078216076323745E-13 2.42861801852898E-13 5.534496503702012E-10 -7.05678170807893E-11 2.21688960444237E-10 7.971429649494677E-12
i 3.005949432525146E-15 -7.093440876576987E-15 3.537342293022303E-12 -7.64672491218578E-12 7.971429649494677E-12 2.730790140658413E-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 14.37   n/a MPO614063  
diameter diameter 3.855 km 0.200 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 15.1665 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.248   0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18393 (1992 QB)          Discovered 1992-Aug-19 by McNaught, R. H. at Siding Spring
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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