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15904 Halstead (1997 SD11)
Classification: Main-belt Asteroid          SPK-ID: 2015904
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02631692100290099 1.9098e-08  
a 2.163083670347225 5.2024e-09 au
q 2.106157968272032 4.1863e-08 au
i 3.046250703116088 2.3409e-07 deg
node 242.0982792446515 1.1651e-05 deg
peri 268.7206569915593 1.9775e-05 deg
M 15.15656475671985 1.7334e-05 deg
tp 2459347.577720602632
(2021-May-13.07772060)
5.588e-05 TDB
period 1162.006092128752
3.18
4.1921e-06
1.148e-08
d
yr
n .3098090469908752 1.1177e-09 deg/d
Q 2.220009372422418 5.3393e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2617  
   data-arc span      15052 days (41.21 yr)  
   first obs. used      1980-03-23  
   last obs. used      2021-06-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46497  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 14:05:07  

Additional Information
 Earth MOID = 1.11882 au 
 Jupiter MOID = 2.7541 au 
 T_jup = 3.693 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457344.5 (2015-Nov-18.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02584667709420239 1.9088e-08  
q 2.106804680687509 4.1814e-08 au
tp 2457023.252080515672
(2014-Dec-31.75208052)
5.4096e-05 TDB
node 242.1255883325447 1.1651e-05 deg
peri 268.563072164945 2.0036e-05 deg
i 3.046102489016641 2.3428e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2617  
   data-arc span      15052 days (41.21 yr)  
   first obs. used      1980-03-23  
   last obs. used      2021-06-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46497  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 14:05:07  

Additional Information
 Jupiter MOID = 2.7541 au 
 T_jup = 3.693 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.643663852236735E-16 -7.923185148409533E-16 -6.720074247609033E-14 -3.663446034665893E-14 -5.820731492713329E-16 -6.398641783781228E-16
q -7.923185148409533E-16 1.748385347458577E-15 2.169006047112648E-13 7.936144069049266E-14 2.504794258297112E-14 1.414999895077567E-15
tp -6.720074247609033E-14 2.169006047112648E-13 2.926366336363243E-9 5.841164114898035E-11 8.835219998200061E-10 -2.647526740620327E-12
node -3.663446034665893E-14 7.936144069049266E-14 5.841164114898035E-11 1.357433723619983E-10 -1.165034328260082E-10 -1.243727085902996E-12
peri -5.820731492713329E-16 2.504794258297112E-14 8.835219998200061E-10 -1.165034328260082E-10 4.014611308638317E-10 4.744841121782465E-13
i -6.398641783781228E-16 1.414999895077567E-15 -2.647526740620327E-12 -1.243727085902996E-12 4.744841121782465E-13 5.488676824553878E-14

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.26   n/a MPO614063  
diameter diameter 3.812 km 0.150 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.211   0.061 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15904 Halstead           Discovered 1997 Sept. 29 by T. Stafford at the Zeno Observatory.
Susan Ruth Halstead (b. 1959) is the sister of the discoverer.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040713/MPCPages.arcLast Updated: 2004-07-14

Alternate Designations
 1997 SD11 = 1980 FB6 = 1981 QU4 = 1998 YF 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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