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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1900025244484141 3.0315e-08  
a 2.238507292817292 6.1574e-09 au
q 1.813185256185821 6.6253e-08 au
i 8.357184567369542 4.1512e-06 deg
node 69.79469268227594 2.4255e-05 deg
peri 257.3438396006356 2.7429e-05 deg
M 62.77265528043296 1.2725e-05 deg
tp 2458987.193447710049
(2020-May-17.69344771)		 4.3199e-05 TDB
period 1223.309074330635
3.35		 5.0474e-06
1.382e-08		 d
yr
n .2942837648751876 1.2142e-09 deg/d
Q 2.663829329448763 7.3273e-09 au
   Orbit Determination Parameters
   # obs. used (total)      1874  
   data-arc span      10565 days (28.93 yr)  
   first obs. used      1992-03-11  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48022  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:32:12  

Additional Information
 Earth MOID = .821819 au 
 Jupiter MOID = 2.69559 au 
 T_jup = 3.599 
[ 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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