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6135 Billowen (1990 RD9)
Classification: Main-belt Asteroid          SPK-ID: 2006135
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1262102678115613 3.16e-08  
a 2.43080003569143 6.7344e-09 au
q 2.124008112190462 7.8144e-08 au
i 11.32091954238892 4.2377e-06 deg
node 291.4779519189312 1.8222e-05 deg
peri 271.3636763487859 2.6026e-05 deg
M 67.37765953856179 1.8964e-05 deg
tp 2458741.418920323402
(2019-Sep-14.91892032)
7.2798e-05 TDB
period 1384.274688707391
3.79
5.7526e-06
1.575e-08
d
yr
n .2600639908659755 1.0807e-09 deg/d
Q 2.737591959192398 7.5844e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2452  
   data-arc span      21950 days (60.10 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39294  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:38:06  

Additional Information
 Earth MOID = 1.15657 au 
 Jupiter MOID = 2.36182 au 
 T_jup = 3.470 
[ 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 13.1   n/a MPO473851  
diameter diameter 10.969 km 0.424 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 28.463 h n/a LCDB (Rev. 2019-August); 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 0.111   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

6135 Billowen (1990 RD9)          Discovered 1990-Sep-14 by Holt, H. E. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1990 RD9 = 1970 GL = 1981 AA2 = 1985 DE1 = 1987 VL = 1991 VZ3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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