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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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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1778524814645347 1.7388e-08  
a 3.107238002815968 1.2484e-08 au
q 2.554608013514243 5.7772e-08 au
i 1.945384690618856 4.1424e-07 deg
node 41.27902406473741 6.5905e-06 deg
peri 13.1150058639652 8.9477e-06 deg
M 191.7503124287284 7.8785e-06 deg
tp 2460135.500778203736
(2023-Jul-10.00077820)
4.7095e-05 TDB
period 2000.599733718726
5.48
1.2057e-05
3.301e-08
d
yr
n .1799460401460866 1.0845e-09 deg/d
Q 3.659867992117693 1.4705e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2973  
   data-arc span      33189 days (90.87 yr)  
   first obs. used      1929-10-01  
   last obs. used      2020-08-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46049  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 14:25:11  

Additional Information
 Earth MOID = 1.56535 au 
 Jupiter MOID = 1.70937 au 
 T_jup = 3.195 
[ 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 12.13   n/a E2020-QM5  
rotation period rot_per 14.310 h n/a LCDB (Rev. 2020-October); 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

[ show close-approach data ]
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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