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6489 Golevka (1991 JX)
Classification: Apollo [NEO, PHA]          SPK-ID: 2006489
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 106 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6128395545967215 2.4161e-09  
a 2.485242462229812 1.7146e-09 au
q .9621875786120346 5.5415e-09 au
i 2.26594021238454 6.1952e-07 deg
node 209.5399089111425 2.1804e-05 deg
peri 68.60383321230876 2.2697e-05 deg
M 159.9757015836967 1.1973e-06 deg
tp 2458564.579101712152
(2019-Mar-22.07910171)
4.1031e-06 TDB
period 1431.039346083768
3.92
1.4809e-06
4.054e-09
d
yr
n .2515654101232007 2.6034e-10 deg/d
Q 4.008297345847589 2.7654e-09 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -1.216748809307156E-14 1.45E-15
ALN [SET] 1. n/a
NK [SET] 0. n/a
NM [SET] 2. n/a
R0 [SET] 1. n/a
  Orbit Determination Parameters
   # obs. used (total)      1017  
   # delay obs. used      20  
   # Doppler obs. used      20  
   data-arc span      8968 days (24.55 yr)  
   first obs. used      1991-04-15  
   last obs. used      2015-11-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .629  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 18:48:39  

Additional Information
 Earth MOID = .0245718 au 
 Jupiter MOID = 1.17059 au 
 T_jup = 3.185 
 Nongravitational accels. using nonstandard g(r) = (1 au/ r)^2 
[ 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 19.2   n/a PDS3 (MPC 28115)  
diameter diameter 0.53 km 0.03 Hudson et al., Icarus 148, 2000.  
bulk density density 2.7 g/cm^3 +.4-.6 Chesley et al. 2003, Science 302, 1739-1742. Porosity 19%
rotation period rot_per 6.026 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Mottola, S.; et al. (1997) Astron. J. 114, 1234-1245.]
[Hudson, R.S.; et al. (2000) Icarus 148, 37-51.]
[Kaasalainen, M.; Torppa, J.; Muinonen, K. (2001) Icarus 153, 37-51.]
geometric albedo albedo 0.151   0.023 Hudson et al., Icarus 148, 2000.  
SMASSII spectral type spec_B Q   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

6489 Golevka (1991 JX)          Discovered 1991-May-10 by Helin, E. F. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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