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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09924378604808387 4.0996e-08  
a 3.010127480155229 1.1793e-08 au
q 2.711391032537245 1.2457e-07 au
i 9.832820594886947 5.1605e-06 deg
node 9.942759304317828 2.0992e-05 deg
peri 39.92418107076123 3.0912e-05 deg
M 13.76611142877054 2.1639e-05 deg
tp 2458927.556845732136
(2020-Mar-19.05684573)
0.00011466 TDB
period 1907.549250367815
5.22
1.121e-05
3.069e-08
d
yr
n .1887238297677423 1.1091e-09 deg/d
Q 3.308863927773212 1.2964e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2605  
   data-arc span      31909 days (87.36 yr)  
   first obs. used      1933-03-25  
   last obs. used      2020-08-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45248  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:36:39  

Additional Information
 Earth MOID = 1.72885 au 
 Jupiter MOID = 2.11225 au 
 T_jup = 3.220 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456396.5 (2013-Apr-14.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09605521108874321 4.0893e-08  
q 2.722615784971363 1.2375e-07 au
tp 2457007.793860232996
(2014-Dec-16.29386023)
0.00012032 TDB
node 10.03110551718667 2.0967e-05 deg
peri 37.85388367114201 3.1566e-05 deg
i 9.839857988118382 5.1593e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2605  
   data-arc span      31909 days (87.36 yr)  
   first obs. used      1933-03-25  
   last obs. used      2020-08-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45248  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:36:39  

Additional Information
 Jupiter MOID = 2.11225 au 
 T_jup = 3.220 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.672231966530497E-15 -5.041538808314553E-15 -1.740525388777142E-12 2.505803190203512E-15 -3.499484224348281E-13 5.325302505891058E-16
q -5.041538808314553E-15 1.531317110487034E-14 5.139130647623591E-12 -6.897168900926977E-15 1.023702003749814E-12 -5.781079840511702E-16
tp -1.740525388777142E-12 5.139130647623591E-12 1.447647465709322E-8 -1.591965319409571E-11 2.84939147032383E-9 -4.564892013574052E-12
node 2.505803190203512E-15 -6.897168900926977E-15 -1.591965319409571E-11 4.395974167639238E-10 -4.358232309566097E-10 4.151247395115443E-12
peri -3.499484224348281E-13 1.023702003749814E-12 2.84939147032383E-9 -4.358232309566097E-10 9.964143095604166E-10 -4.973985832411106E-12
i 5.325302505891058E-16 -5.781079840511702E-16 -4.564892013574052E-12 4.151247395115443E-12 -4.973985832411106E-12 2.661873607754743E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.4   n/a MPO332830  
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. 2019-August); 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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