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1552 Bessel (1938 DE1)
Classification: Main-belt Asteroid          SPK-ID: 2001552
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09957280500831885 1.9076e-08  
a 3.010854340035452 1.0093e-08 au
q 2.711055127926651 5.5003e-08 au
i 9.833138558121501 4.3823e-07 deg
node 9.929215404912156 3.7618e-06 deg
peri 39.94657392901627 1.3648e-05 deg
M 88.44831843881992 1.1088e-05 deg
tp 2458927.664892644345
(2020-Mar-19.16489264)
5.8768e-05 TDB
period 1908.240220132416
5.22
9.5953e-06
2.627e-08
d
yr
n .1886554932664709 9.4863e-10 deg/d
Q 3.310653552144253 1.1098e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3321  
   data-arc span      32222 days (88.22 yr)  
   first obs. used      1933-03-25  
   last obs. used      2021-06-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42011  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 12:30:38  

Additional Information
 Earth MOID = 1.72797 au 
 Jupiter MOID = 2.11103 au 
 T_jup = 3.220 
[ 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 11.51   n/a E2021B10  
diameter diameter 18.514 km 0.066 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 8.996 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Delbo, M.; Ali-Lagoa, V.; Bolin, B.; et al. (2016) Astron. Astrophys., submitted.]
[Hanus, J.; Delbo, M.; Ali-Lagoa, V.; Bolin, B.; et al. (2018) Icarus 299, 84-96.]
geometric albedo albedo 0.156   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1552 Bessel (1938 DE1)          Discovered 1938-Feb-24 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1938 DE1 = 1933 FJ1 = 1948 EH = 1951 UF 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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