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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2116527528967171 1.5202e-08  
a 2.651034438199879 9.08e-09 au
q 2.089935701330873 4.0141e-08 au
i 22.59384683530269 3.2655e-07 deg
node 167.3315268742697 1.2442e-06 deg
peri 281.0039617276728 3.3902e-06 deg
M 190.6938999893751 5.1257e-06 deg
tp 2459941.966588822971
(2022-Dec-28.46658882)
2.5283e-05 TDB
period 1576.599850563672
4.32
8.1e-06
2.218e-08
d
yr
n .2283394863137221 1.1731e-09 deg/d
Q 3.212133175068885 1.1002e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2839  
   data-arc span      26490 days (72.53 yr)  
   first obs. used      1948-09-07  
   last obs. used      2021-03-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4152  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:10:20  

Additional Information
 Earth MOID = 1.22705 au 
 Jupiter MOID = 2.24523 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 12.07   n/a E2021B10  
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. 2020-October); 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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