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18061 (1999 XH179)
Classification: Main-belt Asteroid          SPK-ID: 2018061
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09559889053257123 4.0564e-08  
a 2.965200560236219 1.7942e-08 au
q 2.681730676471078 1.1991e-07 au
i 11.95540735776916 4.7081e-06 deg
node 63.69573441596132 2.9651e-05 deg
peri 16.41021273680711 4.6196e-05 deg
M 68.55089300261741 3.3744e-05 deg
tp 2458845.367717209471
(2019-Dec-27.86771721)
0.00017467 TDB
period 1865.003010241003
5.11
1.6928e-05
4.635e-08
d
yr
n .193029179053968 1.752e-09 deg/d
Q 3.248670444001361 1.9658e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1064  
   data-arc span      15455 days (42.31 yr)  
   first obs. used      1978-11-30  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52202  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:40:22  

Additional Information
 Earth MOID = 1.69864 au 
 Jupiter MOID = 2.0424 au 
 T_jup = 3.225 
[ 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 14.08   n/a MPCxxxxx  
diameter diameter 6.058 km 0.170 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 15.7837 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 0.110   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18061 (1999 XH179)          Discovered 1999-Dec-10 by LINEAR at Socorro
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 XH179 = 1978 WP15 = 1988 VC12 = 1996 JG4 = 1998 XA17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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