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4034 Vishnu (1986 PA)
Classification: Apollo [NEO, PHA]          SPK-ID: 2004034
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2455587.5 (2011-Jan-26.0) TDB
Reference: JPL 73 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4439051938481083 5.9229e-08  
a 1.059653890093643 5.1829e-09 au
q .5892680245997226 6.1473e-08 au
i 11.17007366517922 5.6023e-06 deg
node 158.0036734030674 3.1095e-05 deg
peri 296.5800497394488 2.8398e-05 deg
M 50.80809315190232 1.1347e-05 deg
tp 2455531.269120374084
(2010-Nov-30.76912037)
1.2627e-05 JED
period 398.4230741509699
1.09
2.9231e-06
8.003e-09
d
yr
n .9035621261824544 6.6291e-09 deg/d
Q 1.530039755587564 7.4836e-09 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -7.394054731227197E-14 1.721E-14
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)      482  
   # delay obs. used      0  
   # Doppler obs. used      1  
   data-arc span      10565 days (28.93 yr)  
   first obs. used      1986-08-02  
   last obs. used      2015-07-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48199  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 16:52:40  

Additional Information
 Earth MOID = .0192758 au 
 Jupiter MOID = 3.68865 au 
 T_jup = 5.704 
 Nongravitational accels. using nonstandard g(r) = (1 AU/ r)^2 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 18.4 mag n/a MPO263383  
diameter diameter 0.42 km n/a Delbo et al. (2003). Icarus, v. 166, pp. 116-130  
geometric albedo albedo 0.52   n/a Delbo et al. (2003). Icarus, v. 166, pp. 116-130  
SMASSII spectral type spec_B O   n/a Binzel et al. (2004) Icarus 170, 259-294  

4034 Vishnu           Discovered 1986 Aug. 2 by E. F. Helin at Palomar.
Vishnu is the Hindu god of preservation. Name suggested by J. Meeus.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20110715/MPCPages.arcLast Updated: 2011-07-20

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