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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1666940254911093 1.8356e-08  
a 2.232813588963423 5.5452e-09 au
q 1.860616903647859 4.1903e-08 au
i 3.195366986013832 7.0674e-07 deg
node 122.909177669554 5.8454e-06 deg
peri 197.2894099927721 4.9722e-06 deg
M 25.29407601686066 4.3664e-06 deg
tp 2459310.876407516065
(2021-Apr-06.37640752)
1.4548e-05 TDB
period 1218.644763843898
3.34
4.5398e-06
1.243e-08
d
yr
n .2954101233442907 1.1005e-09 deg/d
Q 2.605010274278987 6.4696e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3193  
   data-arc span      23448 days (64.20 yr)  
   first obs. used      1957-05-29  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43887  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 10:16:18  

Additional Information
 Earth MOID = .847256 au 
 Jupiter MOID = 2.68513 au 
 T_jup = 3.620 
[ 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 12.86   n/a MPO636126  
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[UNPUBLISHED.]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

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 ]
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