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JPL Small-Body Database Browser
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3728 IRAS (1983 QF)
Classification: Main-belt Asteroid          SPK-ID: 2003728
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2121678818027943 2.7918e-08  
a 2.649937197066595 9.5358e-09 au
q 2.087705635054542 7.3243e-08 au
i 22.59293765649807 4.6372e-06 deg
node 167.3568995152611 8.2706e-06 deg
peri 280.9817861172343 1.4049e-05 deg
M 144.9992261341538 1.1135e-05 deg
tp 2458365.878205819681
(2018-Sep-04.37820582)
4.8024e-05 TDB
period 1575.621139477939
4.31
8.5048e-06
2.328e-08
d
yr
n .2284813214166961 1.2333e-09 deg/d
Q 3.212168759078649 1.1559e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2351  
   data-arc span      26167 days (71.64 yr)  
   first obs. used      1948-09-07  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4207  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:58:23  

Additional Information
 Earth MOID = 1.22506 au 
 Jupiter MOID = 2.24674 au 
 T_jup = 3.251 
[ 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 12.1   n/a MPO473817  
diameter diameter 23.450 km 0.115 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 8.323 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2009) Minor Planet Bull. 36, 7-13.]
geometric albedo albedo 0.086   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

3728 IRAS (1983 QF)          Discovered 1983-Aug-23 by IRAS
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1983 QF = 1948 RN = 1963 FA = 1972 FH = 1976 GL = 1985 GT 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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