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2540 Blok (1971 TH2)
Classification: Main-belt Asteroid          SPK-ID: 2002540
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05132684201032035 1.747e-08  
a 2.196255158963302 4.808e-09 au
q 2.083528317404841 3.96e-08 au
i 1.265932821804021 2.6391e-07 deg
node 183.4711731060156 1.3934e-05 deg
peri 262.2621307663546 1.5787e-05 deg
M 328.1223770064955 9.076e-06 deg
tp 2459305.770345461759
(2021-Apr-01.27034546)
3.0094e-05 TDB
period 1188.837836935188
3.25
3.9039e-06
1.069e-08
d
yr
n .3028167415398523 9.9438e-10 deg/d
Q 2.308982000521763 5.0548e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2854  
   data-arc span      25935 days (71.01 yr)  
   first obs. used      1950-03-08  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40598  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:55:10  

Additional Information
 Earth MOID = 1.09978 au 
 Jupiter MOID = 2.76899 au 
 T_jup = 3.667 
[ 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 13.17   n/a E2021B10  
diameter diameter 5.671 km 0.122 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 19.20 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 [Result based on fragmentary lightcurve(s), may be completely wrong.]
geometric albedo albedo 0.302   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

2540 Blok (1971 TH2)          Discovered 1971-Oct-13 by Chernykh, L. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1971 TH2 = 1950 ED = 1957 JQ = 1960 FK = 1968 UZ = 1980 LN = 1981 UQ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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