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27791 Masaru (1993 DD1)
Classification: Main-belt Asteroid          SPK-ID: 2027791
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05626020716185218 3.4198e-08  
a 2.187864052972974 6.0336e-09 au
q 2.064774368110745 7.3403e-08 au
i 4.738129470621705 4.2216e-06 deg
node 18.02614361400614 3.16e-05 deg
peri 131.445988678033 4.8559e-05 deg
M 169.3063024206134 3.825e-05 deg
tp 2458444.596318343848
(2018-Nov-22.09631834)
0.0001246 TDB
period 1182.031162071193
3.24
4.8897e-06
1.339e-08
d
yr
n .3045604985313555 1.2599e-09 deg/d
Q 2.310953737835203 6.3731e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2615  
   data-arc span      10635 days (29.12 yr)  
   first obs. used      1991-09-17  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44144  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:21:13  

Additional Information
 Earth MOID = 1.07813 au 
 Jupiter MOID = 2.66758 au 
 T_jup = 3.669 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457311.5 (2015-Oct-16.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05630801469468494 3.4e-08  
q 2.064853723819961 7.2963e-08 au
tp 2457261.107260712069
(2015-Aug-26.60726071)
0.00012307 TDB
node 18.08805113410133 3.1585e-05 deg
peri 130.9580620741837 4.8685e-05 deg
i 4.739550429629048 4.2221e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2615  
   data-arc span      10635 days (29.12 yr)  
   first obs. used      1991-09-17  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44144  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:21:13  

Additional Information
 Jupiter MOID = 2.66758 au 
 T_jup = 3.669 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.155989734023415E-15 -2.473802699621264E-15 2.194100116877621E-12 5.067928910753747E-15 6.708371060037824E-13 2.309932892016255E-15
q -2.473802699621264E-15 5.323590768906455E-15 -4.517822694381647E-12 -1.128474520068652E-14 -1.381677043649106E-12 -4.855462392214303E-15
tp 2.194100116877621E-12 -4.517822694381647E-12 1.51454755173623E-8 -3.105841271038541E-12 4.563238932257022E-9 1.035689516493929E-11
node 5.067928910753747E-15 -1.128474520068652E-14 -3.105841271038541E-12 9.976220963983092E-10 -9.946038583763974E-10 -1.012362295327487E-11
peri 6.708371060037824E-13 -1.381677043649106E-12 4.563238932257022E-9 -9.946038583763974E-10 2.370191421623931E-9 1.320778153128483E-11
i 2.309932892016255E-15 -4.855462392214303E-15 1.035689516493929E-11 -1.012362295327487E-11 1.320778153128483E-11 1.782572923495365E-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 14.0   n/a MPO319428  
diameter diameter 3.073 km 0.158 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.565   0.095 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

27791 Masaru           Discovered 1993 Feb. 24 by Y. Kushida and O. Muramatsu at the Yatsugatake South Base Observatory.
Masaru Kubota (b. 1959) is a broadcaster at a television station and a certified weather forecaster. He makes an effort to popularize science and astronomy through his weather reports.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020624/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1993 DD1 = 1991 SH5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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