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JPL Small-Body Database Browser
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2028 Janequeo (1968 OB1)
Classification: Main-belt Asteroid          SPK-ID: 2002028
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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1127752119483528 3.3371e-08  
a 2.296291694170129 9.1911e-09 au
q 2.03732691166485 7.7049e-08 au
i 7.956431034079841 3.9948e-06 deg
node 242.7949922901215 2.8701e-05 deg
peri 27.70119363545659 3.706e-05 deg
M 239.8920970585494 2.6545e-05 deg
tp 2459024.541237115913
9.4965e-05 TDB
period 1270.980856573143
n .2832458082576027 1.7006e-09 deg/d
Q 2.555256476675407 1.0228e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1397  
   data-arc span      18522 days (50.71 yr)  
   first obs. used      1968-07-18  
   last obs. used      2019-04-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52538  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 18:15:32  

Additional Information
 Earth MOID = 1.02462 au 
 Jupiter MOID = 2.51667 au 
 T_jup = 3.573 
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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 14.8   n/a MPO381269  
diameter diameter 3.201 km 0.290 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 2.480 h n/a LCDB (Rev. 2019-January); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.273   0.070 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

2028 Janequeo           Discovered 1968 July 18 by C. Torres on exposures by S. Cofre and himself at the University of Chile, Cerro El Roble Station.
Named for the wife of the Araucanian chief Guepotan. After her husband's death in battle, she took command and won. Later, she brought together Indians from various tribes and commanded them successfully in several further battles.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 5359Last Updated: 2006-03-21

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