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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1300120401425548 3.5268e-08  
a 2.72095255045585 1.2739e-08 au
q 2.367195958239997 9.5463e-08 au
i 6.428400284288947 4.4619e-06 deg
node 4.655158597297052 3.504e-05 deg
peri 273.2123157176445 3.8965e-05 deg
M 202.2165829483885 1.8047e-05 deg
tp 2459319.019792526569
(2021-Apr-14.51979253)
8.3409e-05 TDB
period 1639.380932059253
4.49
1.1513e-05
3.152e-08
d
yr
n .2195950879749456 1.5422e-09 deg/d
Q 3.074709142671703 1.4396e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2537  
   data-arc span      23664 days (64.79 yr)  
   first obs. used      1954-07-28  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46063  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 22:17:58  

Additional Information
 Earth MOID = 1.36135 au 
 Jupiter MOID = 2.08431 au 
 T_jup = 3.337 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456302.5 (2013-Jan-10.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1320112006878232 3.5545e-08  
q 2.35999960491749 9.6481e-08 au
tp 2456034.963084985546
(2012-Apr-17.46308499)
7.7997e-05 TDB
node 4.825412392320544 3.5127e-05 deg
peri 271.9846969822074 3.8853e-05 deg
i 6.423680813443068 4.4565e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2537  
   data-arc span      23664 days (64.79 yr)  
   first obs. used      1954-07-28  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46063  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 22:17:58  

Additional Information
 Jupiter MOID = 2.08431 au 
 T_jup = 3.337 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.263423315467099E-15 -3.407483755691978E-15 3.001803300198918E-13 3.162000691424099E-15 6.32953443733931E-14 2.459199655851894E-16
q -3.407483755691978E-15 9.308645201219919E-15 -8.021383559685148E-13 -8.605752669405915E-15 -1.664279588973048E-13 -2.167861051258895E-16
tp 3.001803300198918E-13 -8.021383559685148E-13 6.083467105148919E-9 3.02320528535902E-12 1.311377359381556E-9 9.329613268706424E-13
node 3.162000691424099E-15 -8.605752669405915E-15 3.02320528535902E-12 1.233920309492986E-9 -1.225121351519158E-9 -1.827618750502145E-11
peri 6.32953443733931E-14 -1.664279588973048E-13 1.311377359381556E-9 -1.225121351519158E-9 1.509527467345055E-9 1.834319571708507E-11
i 2.459199655851894E-16 -2.167861051258895E-16 9.329613268706424E-13 -1.827618750502145E-11 1.834319571708507E-11 1.986024065944858E-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

[ show close-approach data ]
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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