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2884 Reddish (1981 ES22)
Classification: Main-belt Asteroid          SPK-ID: 2002884
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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1778860280370975 3.7921e-08  
a 3.107200189186595 1.328e-08 au
q 2.554472689216074 1.1742e-07 au
i 1.945413716425717 4.5165e-06 deg
node 41.2796372877952 9.0793e-05 deg
peri 13.1677216683105 9.1303e-05 deg
M 155.6855851634751 1.0759e-05 deg
tp 2458135.336514796952
(2018-Jan-16.83651480)
5.7262e-05 TDB
period 2000.563214288948
5.48
1.2825e-05
3.511e-08
d
yr
n .1799493249844411 1.1536e-09 deg/d
Q 3.659927689157116 1.5642e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2918  
   data-arc span      33189 days (90.87 yr)  
   first obs. used      1929-10-01  
   last obs. used      2020-08-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45106  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:05:08  

Additional Information
 Earth MOID = 1.566 au 
 Jupiter MOID = 1.7083 au 
 T_jup = 3.195 
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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 12.0   n/a MPO344321  
rotation period rot_per 14.310 h n/a LCDB (Rev. 2019-August); 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:
[Owings, L.E. (2018) Minor Planet Bull. 45, 227-231.]

2884 Reddish (1981 ES22)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1981 ES22 = 1929 TE = 1956 RX = 1973 SB4 = 1973 UC3 = 1975 CD = 1975 EP = 1978 PM2 = 1978 SB4 = 1979 YO3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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