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JPL Small-Body Database Browser
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1241 Dysona (1932 EB1)
Classification: Main-belt Asteroid          SPK-ID: 2001241
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1012872956684945 4.0419e-08  
a 3.187721530557019 1.658e-08 au
q 2.864845837382665 1.2774e-07 au
i 23.51972189696668 5.2873e-06 deg
node 322.1821348316445 9.6122e-06 deg
peri 320.3462022486306 2.8199e-05 deg
M 103.073871519443 2.8166e-05 deg
tp 2458405.297045281259
(2018-Oct-13.79704528)
0.00016221 TDB
period 2078.830071482547
5.69
1.6219e-05
4.441e-08
d
yr
n .1731743276848313 1.3511e-09 deg/d
Q 3.510597223731374 1.8259e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2359  
   data-arc span      36490 days (99.90 yr)  
   first obs. used      1920-03-10  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38554  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:49:29  

Additional Information
 Earth MOID = 1.87946 au 
 Jupiter MOID = 1.87384 au 
 T_jup = 3.060 
[ 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 9.5   n/a MPO502165 IRAS observations used: 17
diameter diameter 79.190 km 0.694 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 8.6080 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2002) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Oey, J.; Vilagi, J.; Gajdos, S.; Kornos, L.; Galad, A. (2007) Minor Planet Bull. 34, 81-83.]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
geometric albedo albedo 0.047   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.750   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=2.12 deg.
U-B UB 0.290   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=2.12 deg.
Tholen spectral type spec_T PDC   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo

1241 Dysona (1932 EB1)          Discovered 1932-Mar-04 by Wood, H. E. at Johannesburg (UO)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1932 EB1 = 1931 AA1 = 1945 RA = 1948 CE = 1956 PB = A908 DC = A920 EB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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