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18578 (1997 XP)
Classification: Main-belt Asteroid          SPK-ID: 2018578
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1899728934993007 3.0319e-08  
a 2.238870290182054 6.1583e-09 au
q 1.81354562298655 6.6268e-08 au
i 8.35648832978389 4.1491e-06 deg
node 69.79361428444494 2.4232e-05 deg
peri 257.3940203797047 2.7405e-05 deg
M 120.3945487437505 1.2735e-05 deg
tp 2458987.290083732606
(2020-May-17.79008373)
4.3188e-05 TDB
period 1223.606644930497
3.35
5.0485e-06
1.382e-08
d
yr
n .2942121975975773 1.2139e-09 deg/d
Q 2.664194957377558 7.3282e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1889  
   data-arc span      10625 days (29.09 yr)  
   first obs. used      1992-03-11  
   last obs. used      2021-04-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48041  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:01:43  

Additional Information
 Earth MOID = .823392 au 
 Jupiter MOID = 2.69477 au 
 T_jup = 3.598 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.80   n/a E2021B10  
diameter diameter 3.366 km 0.059 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.179   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18578 (1997 XP)          Discovered 1997-Dec-03 by Kobayashi, T. at Oizumi
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 XP = 1999 GX44 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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