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2646 Abetti (1977 EC1)
Classification: Main-belt Asteroid          SPK-ID: 2002646
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0958065812457037 4.4629e-08  
a 3.01748409369763 1.5709e-08 au
q 2.728389258717169 1.3355e-07 au
i 9.666215529273799 4.9003e-06 deg
node 352.250918615222 2.3288e-05 deg
peri 36.90248667998355 3.1921e-05 deg
M 281.4483212913708 2.2658e-05 deg
tp 2459618.252330105681
(2022-Feb-07.75233011)
0.0001219 TDB
period 1914.546465593537
5.24
1.4951e-05
4.093e-08
d
yr
n .1880340887356813 1.4684e-09 deg/d
Q 3.30657892867809 1.7214e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2338  
   data-arc span      28096 days (76.92 yr)  
   first obs. used      1943-11-03  
   last obs. used      2020-10-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45418  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 14:04:03  

Additional Information
 Earth MOID = 1.7377 au 
 Jupiter MOID = 2.17 au 
 T_jup = 3.219 
[ 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 11.46   n/a E2021B10  
diameter diameter 16.776 km 0.161 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 38.8888 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.144   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

2646 Abetti (1977 EC1)          Discovered 1977-Mar-13 by Chernykh, N. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1977 EC1 = 1943 VE = 1948 UA = 1953 TZ1 = 1971 BZ = 1979 QP7 = 1979 SJ3 = 1982 FB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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