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27861 (1995 BL4)
Classification: Main-belt Asteroid          SPK-ID: 2027861
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1700646140095173 4.7902e-08  
a 2.577905590606814 1.3033e-08 au
q 2.13949507138729 1.2787e-07 au
i 12.20937516528578 5.5878e-06 deg
node 313.7412336127744 3.4092e-05 deg
peri 121.1997102956893 4.3062e-05 deg
M 356.6694337950204 2.6085e-05 deg
tp 2458614.486675839116
(2019-May-10.98667584)
0.00010958 TDB
period 1511.816007306362
4.14
1.1465e-05
3.139e-08
d
yr
n .2381242150236393 1.8058e-09 deg/d
Q 3.016316109826338 1.5249e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1456  
   data-arc span      10493 days (28.73 yr)  
   first obs. used      1991-03-16  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45957  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 01:42:14  

Additional Information
 Earth MOID = 1.1828 au 
 Jupiter MOID = 2.27167 au 
 T_jup = 3.374 
[ 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 13.4   n/a MPO358889  
diameter diameter 5.732 km 0.136 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 28.273 h n/a LCDB (Rev. 2019-January); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.257   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

27861 (1995 BL4)          Discovered 1995-Jan-28 by Endate, K., Watanabe, K. at Kitami
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1995 BL4 = 1991 FQ6 = 1998 XX16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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