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4150 Starr (1984 QC1)
Classification: Main-belt Asteroid          SPK-ID: 2004150
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1666106342396857 3.3132e-08  
a 2.23241630425059 6.3098e-09 au
q 1.860472007912384 7.6517e-08 au
i 3.195265518449198 3.0823e-06 deg
node 122.9105793706921 5.2629e-05 deg
peri 197.4429156016208 5.3267e-05 deg
M 268.172988972799 9.3354e-06 deg
tp 2459311.262890913318
(2021-Apr-06.76289091)
3.2167e-05 TDB
period 1218.319527961711
3.34
5.1653e-06
1.414e-08
d
yr
n .2954889844064899 1.2528e-09 deg/d
Q 2.604360600588796 7.3611e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3028  
   data-arc span      23077 days (63.18 yr)  
   first obs. used      1957-05-29  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44257  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 23:12:18  

Additional Information
 Earth MOID = .847812 au 
 Jupiter MOID = 2.6876 au 
 T_jup = 3.621 
[ 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 12.8   n/a MPO358670  
diameter diameter 6.641 km 0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 4.5179 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Bianchi, E.; Padova, E. (1921) Mem. Soc. Astron. Ital. 2, 45-54.]
[UNPUBLISHED.]
geometric albedo albedo 0.277   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

4150 Starr (1984 QC1)          Discovered 1984-Aug-31 by Skiff, B. A. at Flagstaff
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1984 QC1 = 1957 KG = 1964 RH = 1973 FD2 = 1974 QM1 = 1980 EA2 = 1981 TO2 = 1981 WE6 = 1981 WJ3 = 1988 YC = 2004 SL12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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