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JPL Small-Body Database Browser
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4954 Eric (1990 SQ)
Classification: Amor [NEO]          SPK-ID: 2004954
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 431 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4494348028198386 3.105e-08  
a 2.001160097468248 4.3071e-09 au
q 1.101769103651677 6.184e-08 au
i 17.42800612136682 6.2554e-06 deg
node 358.446007391735 1.0816e-05 deg
peri 52.60981849737122 1.2292e-05 deg
M 11.63360728631092 6.7992e-06 deg
tp 2458567.085645386006
(2019-Mar-24.58564539)
1.944e-05 TDB
period 1034.001523774345
2.83
3.3382e-06
9.139e-09
d
yr
n .348161962746357 1.124e-09 deg/d
Q 2.900551091284818 6.2428e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2515  
   data-arc span      16244 days (44.47 yr)  
   first obs. used      1975-06-07  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41756  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-28 08:11:21  

Additional Information
 Earth MOID = .194159 au 
 Jupiter MOID = 2.69859 au 
 T_jup = 3.657 
[ 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 12.5   n/a MPO416765  
diameter diameter 10.8 km n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543 based on assumed medium albedo (0.15)
rotation period rot_per 12.056 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Krugly, Yu.N.; Shevchenko, V.G. (1994) Abstracts of Small Bodies Conf.; Mariehamn, p. 86.]
[Pravec, P.; Wolf, M.; Varady, M.; Barta, P. (1995) Earth, Moon, and Planets 71, 177-187.]
[Zeigler, K.W.; Monsees, R.D.; Brown, L. (1998) Minor Planet Bull. 25, 13-14.]
[Warner, B.D (2011) Minor Planet Bull. 38, 25-31.]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
[Warner, B.D. (2014) Minor Planet Bull. 41, 157-168.]
geometric albedo albedo 0.176   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

4954 Eric (1990 SQ)          Discovered 1990-Sep-23 by Roman, B. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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