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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 106 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6127004372903385 2.4177e-09  
a 2.485448959521923 1.7171e-09 au
q .9626132951600239 5.5464e-09 au
i 2.265597261259289 6.1907e-07 deg
node 209.5162672755789 2.1808e-05 deg
peri 68.63434662893273 2.2701e-05 deg
M 209.2551195355899 1.2487e-06 deg
tp 2459995.802061170373
(2023-Feb-20.30206117)
5.5841e-06 TDB
period 1431.217706078392
3.92
1.4831e-06
4.061e-09
d
yr
n .2515340597528087 2.6066e-10 deg/d
Q 4.008284623883822 2.7691e-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 = .0248592 au 
 Jupiter MOID = 1.16967 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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