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1566 Icarus (1949 MA)
Classification: Apollo [NEO, PHA]          SPK-ID: 2001566
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 98 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .8268745609816924 6.8831e-08  
a 1.078077978807624 1.2811e-10 au
q .1866427233770396 7.4204e-08 au
i 22.82686341918962 1.5097e-05 deg
node 88.01236697072869 3.9879e-06 deg
peri 31.3817043637963 8.5477e-06 deg
M 39.42157599311829 3.6982e-06 deg
tp 2457555.728136480055
(2016-Jun-16.22813648)
4.1985e-06 JED
period 408.8591199396448
1.12
7.2879e-08
1.995e-10
d
yr
n .8804988868858854 1.5695e-10 deg/d
Q 1.969513234238208 2.3404e-10 au
  Orbit Determination Parameters
   # obs. used (total)      928  
   # delay obs. used      4  
   # Doppler obs. used      13  
   data-arc span      24099 days (65.98 yr)  
   first obs. used      1949-07-01  
   last obs. used      2015-06-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .39363  
   data source      ORB  
   producer      Jon Giorgini  
   solution date      2015-Jun-25 15:19:54  

Additional Information
 Earth MOID = .0343735 au 
 Jupiter MOID = 3.22158 au 
 T_jup = 5.298 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.9 mag n/a PDS3 (MPC 28106)  
diameter diameter 1.0 km n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543  
rotation period rot_per 2.2726 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Published Reference List:
[Miner, E.; Young, J. (1969) Icarus 10, 436-440.]
[Gehrels, T.; Roemer, E.; Taylor, R.C.; Zellner, B.H. (1970) Astron. J. 75, 186-195.]
[De Angelis, G. (1995) Planet. Space Sci. 43, 649-682.]
[Warner, B.D. (2015) Minor Planet Bul. 42, 256-266.]
[Behrend, R. (2015) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.51   n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543  
B-V BV .774 mag .035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=13; phase (min.=38.56, mean=70.86, max.=102.48) deg.
U-B UB .520 mag .067 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=9; phase (min.=38.56, mean=68.16, max.=100.85) deg.

1566 Icarus (1949 MA)          Discovered 1949-Jun-27 by Baade, W. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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