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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1667332544915991 1.8369e-08  
a 2.232867133992691 5.5032e-09 au
q 1.86057392989476 4.1996e-08 au
i 3.195336582440352 7.0714e-07 deg
node 122.9094056690875 5.8456e-06 deg
peri 197.3888867136637 4.9765e-06 deg
M 327.3240388252553 4.2376e-06 deg
tp 2459311.116170541432
(2021-Apr-06.61617054)
1.4639e-05 TDB
period 1218.688600526731
3.34
4.5054e-06
1.234e-08
d
yr
n .2953994973321354 1.0921e-09 deg/d
Q 2.605160338090622 6.4207e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3072  
   data-arc span      23087 days (63.21 yr)  
   first obs. used      1957-05-29  
   last obs. used      2020-08-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44127  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:00:20  

Additional Information
 Earth MOID = .845926 au 
 Jupiter MOID = 2.68626 au 
 T_jup = 3.620 
[ 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 12.85   n/a E2021B10  
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. 2020-October); 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[UNPUBLISHED.]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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