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2730 Barks (1981 QH)
Classification: Main-belt Asteroid          SPK-ID: 2002730
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1300120380123628 3.5e-08  
a 2.720952549613779 1.2611e-08 au
q 2.367195963303557 9.4813e-08 au
i 6.428400551924115 4.4489e-06 deg
node 4.655159326900429 3.4819e-05 deg
peri 273.2123155640832 3.8752e-05 deg
M 202.216582600451 1.8034e-05 deg
tp 2459319.019793777472
(2021-Apr-14.51979378)
8.3345e-05 TDB
period 1639.380931298228
4.49
1.1398e-05
3.121e-08
d
yr
n .2195950880768849 1.5267e-09 deg/d
Q 3.074709135924001 1.4251e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2608  
   data-arc span      23873 days (65.36 yr)  
   first obs. used      1954-07-28  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45651  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:20:00  

Additional Information
 Earth MOID = 1.36135 au 
 Jupiter MOID = 2.08431 au 
 T_jup = 3.337 
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Orbital Elements at Epoch 2456334.5 (2013-Feb-11.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1319954400394766 3.527e-08  
q 2.360021903974301 9.5799e-08 au
tp 2456034.957290671424
(2012-Apr-17.45729067)
7.792e-05 TDB
node 4.825371192803732 3.4905e-05 deg
peri 271.9842773197682 3.8641e-05 deg
i 6.423704163954439 4.4436e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2608  
   data-arc span      23873 days (65.36 yr)  
   first obs. used      1954-07-28  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45651  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:20:00  

Additional Information
 Jupiter MOID = 2.08431 au 
 T_jup = 3.337 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.243953347820654E-15 -3.357298222241303E-15 3.085060324122953E-13 3.091972108051978E-15 6.611054284731386E-14 2.36455608945761E-16
q -3.357298222241303E-15 9.177375853889276E-15 -8.217105148627643E-13 -8.395390193700551E-15 -1.732957429222749E-13 -1.981021065368633E-16
tp 3.085060324122953E-13 -8.217105148627643E-13 6.071563504468203E-9 3.333606946476032E-12 1.307833940795112E-9 9.593685491677632E-13
node 3.091972108051978E-15 -8.395390193700551E-15 3.333606946476032E-12 1.218360936246545E-9 -1.209587423880582E-9 -1.915043839437838E-11
peri 6.611054284731386E-14 -1.732957429222749E-13 1.307833940795112E-9 -1.209587423880582E-9 1.493088562265312E-9 1.921799846451828E-11
i 2.36455608945761E-16 -1.981021065368633E-16 9.593685491677632E-13 -1.915043839437838E-11 1.921799846451828E-11 1.97453963324997E-11

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 11.8   n/a MPO384775  
diameter diameter 15.830 km 0.120 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 6.084 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Simpson, G.; Chong, E.; Gerhardt, M.; Gorsky, S.; et al. (2013) Minor Planet Bull. 146-151.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.162   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
SMASSII spectral type spec_B C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

2730 Barks (1981 QH)          Discovered 1981-Aug-30 by Bowell, E. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1981 QH = 1935 FQ = 1935 HC = 1963 SP = 1972 TJ5 = 1975 EM1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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