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4827 Dares (1988 QE)
Classification: Jupiter Trojan          SPK-ID: 2004827
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04320966394805029 2.7702e-08  
a 5.128624189004492 7.1852e-08 au
q 4.907018061281766 1.3968e-07 au
i 7.70308850504582 1.8457e-06 deg
node 242.0414220203011 8.9729e-06 deg
peri 169.2359352439619 3.3119e-05 deg
M 205.6678224728061 3.2633e-05 deg
tp 2461019.169252820039
(2025-Dec-09.66925282)
0.00041 TDB
period 4242.284023368033
11.61
8.9152e-05
2.441e-07
d
yr
n .0848599476171303 1.7833e-09 deg/d
Q 5.350230316727218 7.4957e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2147  
   data-arc span      24207 days (66.28 yr)  
   first obs. used      1954-11-23  
   last obs. used      2021-03-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46452  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:49:42  

Additional Information
 Earth MOID = 3.91742 au 
 Jupiter MOID = .00790797 au 
 T_jup = 2.980 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.58   n/a E2021B10  
diameter diameter 42.770 km 0.258 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 18.995 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.067   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

4827 Dares (1988 QE)          Discovered 1988-Aug-17 by Shoemaker, C. S. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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