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162004 (1991 VE)
Classification: Aten [NEO]          SPK-ID: 2162004
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 213 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6646502834836078 3.3191e-08  
a .8908210039622564 2.2472e-09 au
q .2987365711455906 2.9859e-08 au
i 7.218521234338952 3.068e-06 deg
node 61.8672028244011 2.2623e-05 deg
peri 193.6500507542693 2.2296e-05 deg
M 78.14348925601639 7.8968e-06 deg
tp 2458933.838604953336
(2020-Mar-25.33860495)
6.5108e-06 TDB
period 307.1030286115787
0.84
1.1621e-06
3.182e-09
d
yr
n 1.172245033295731 4.4357e-09 deg/d
Q 1.482905436778922 3.7408e-09 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] 2.381775512298966E-14 3.502E-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)      1107  
   # delay obs. used      1  
   # Doppler obs. used      1  
   data-arc span      24109 days (66.01 yr)  
   first obs. used      1954-11-24  
   last obs. used      2020-11-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42676  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-27 05:19:18  

Additional Information
 Earth MOID = .0576565 au 
 Jupiter MOID = 3.58367 au 
 T_jup = 6.454 
 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 18.2   n/a MPO257724  
rotation period rot_per 13.4895 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2012) http://www.asu.cas.cz/~ppravec/neo.htm]
[Warner, B.D. (2015) Minor Planet Bull. 42, 115-127.]
[Pravec, P.; Wolf, M.; Sarounova, L. (2019) http://www.asu.cas.cz/~ppravec/neo.htm]

162004 (1991 VE)          Discovered 1991-Nov-03 by Helin, E. F., Lawrence, K. J. at Palomar
Reference: 20070926/Numbers.arcLast Updated: 2007-09-30

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Alternate Designations
 1991 VE = 1997 WP23 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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