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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02635233446681938 1.9143e-08  
a 2.16310937491179 5.2106e-09 au
q 2.106106393175802 4.1931e-08 au
i 3.046379794095444 2.3413e-07 deg
node 242.1060927480801 1.1652e-05 deg
peri 268.8947533048889 1.9767e-05 deg
M 314.2627638728961 1.7256e-05 deg
tp 2459348.133039891758
(2021-May-13.63303989)
5.5913e-05 TDB
period 1162.026804884642
3.18
4.1987e-06
1.15e-08
d
yr
n .3098035247437674 1.1194e-09 deg/d
Q 2.220112356647778 5.3479e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2528  
   data-arc span      14966 days (40.97 yr)  
   first obs. used      1980-03-23  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46239  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:12:13  

Additional Information
 Earth MOID = 1.11762 au 
 Jupiter MOID = 2.75477 au 
 T_jup = 3.693 
[ 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 14.24   n/a E2021B10  
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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