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JPL Small-Body Database Browser
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1667 Pels (1930 SY)
Classification: Main-belt Asteroid          SPK-ID: 2001667
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1559050307002348 3.921e-08  
a 2.190138896282487 5.6324e-09 au
q 1.848685224419788 8.6835e-08 au
i 4.617384452066807 4.6305e-06 deg
node 80.86413062636899 4.7199e-05 deg
peri 196.0610513302719 4.9428e-05 deg
M 175.7375524066587 1.6821e-05 deg
tp 2458022.579650598875
(2017-Sep-26.07965060)
5.447e-05 TDB
period 1183.875175995236
3.24
4.5669e-06
1.25e-08
d
yr
n .3040861125391556 1.173e-09 deg/d
Q 2.531592568145186 6.5106e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2504  
   data-arc span      32552 days (89.12 yr)  
   first obs. used      1930-09-16  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42973  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 02:07:27  

Additional Information
 Earth MOID = .832299 au 
 Jupiter MOID = 2.57611 au 
 T_jup = 3.653 
[ 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 11.9   n/a MPO347530  
diameter diameter 8.998 km 1.130 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
rotation period rot_per 3.268 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Wisniewski, W.Z.; Michalowski, T.M.; Harris, A.W.; McMillan, R.S. (1997) Icarus 126, 395-449; 1995, Lunar & Planetary Sci. XXVI, 1511-1512.]
[Kryszczynska, A.; Colas, F.; Polinska, M.; Hirsch, R.; et al. (2012) Astron. Astrophys. 546, A72.]
geometric albedo albedo 0.455   0.174 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
SMASSII spectral type spec_B Sa   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)

1667 Pels (1930 SY)          Discovered 1930-Sep-16 by Van Gent, H. at Johannesburg (LS)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1930 SY = 1933 MD = 1936 JA = 1939 FX = 1942 CF = 1949 HM1 = 1952 FC1 = 1953 VT1 = 1953 XD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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