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18047 (1999 RP145)
Classification: Main-belt Asteroid          SPK-ID: 2018047
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1369765958335772 4.0201e-08  
a 3.199682970631757 2.1611e-08 au
q 2.761401289567952 1.3179e-07 au
i 13.71138436017669 4.6224e-06 deg
node 321.4254919645239 1.5358e-05 deg
peri 346.5922971534185 2.1521e-05 deg
M 277.224823302044 1.7132e-05 deg
tp 2459681.180459283466
(2022-Apr-11.68045928)
0.00010108 TDB
period 2090.541781305804
5.72
2.1179e-05
5.798e-08
d
yr
n .1722041641163158 1.7446e-09 deg/d
Q 3.637964651695563 2.4571e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1916  
   data-arc span      11463 days (31.38 yr)  
   first obs. used      1989-11-02  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46023  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:39:51  

Additional Information
 Earth MOID = 1.74702 au 
 Jupiter MOID = 1.6748 au 
 T_jup = 3.136 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.64   n/a E2021B10  
diameter diameter 11.696 km 0.233 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 11.628 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:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.129   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18047 (1999 RP145)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RP145 = 1991 CK1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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