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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1302079499879439 3.0284e-08  
a 2.720016561663009 1.086e-08 au
q 2.365848781235613 8.4676e-08 au
i 6.429656584076794 4.4e-06 deg
node 4.646693421515809 2.8893e-05 deg
peri 273.3648565598331 3.3593e-05 deg
M 289.9324220880347 1.7871e-05 deg
tp 2459319.411627424793
(2021-Apr-14.91162742)
8.1729e-05 TDB
period 1638.535101315669
4.49
9.8133e-06
2.687e-08
d
yr
n .2197084454955749 1.3158e-09 deg/d
Q 3.074184342090405 1.2274e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3060  
   data-arc span      24113 days (66.02 yr)  
   first obs. used      1954-07-28  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43079  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:55:56  

Additional Information
 Earth MOID = 1.36053 au 
 Jupiter MOID = 2.08597 au 
 T_jup = 3.338 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456883.5 (2014-Aug-14.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1308393919137875 3.035e-08  
q 2.365661643041664 8.4871e-08 au
tp 2457675.023875697775
(2016-Oct-13.52387570)
7.9452e-05 TDB
node 4.765684622205206 2.8969e-05 deg
peri 272.2764262216414 3.3554e-05 deg
i 6.421571816896619 4.3929e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3060  
   data-arc span      24113 days (66.02 yr)  
   first obs. used      1954-07-28  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43079  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:55:56  

Additional Information
 Jupiter MOID = 2.08597 au 
 T_jup = 3.338 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.211380697694642E-16 -2.560395944821736E-15 1.848078049485828E-13 6.540829230088874E-16 6.797417280614249E-14 3.488439262223599E-16
q -2.560395944821736E-15 7.203138097053172E-15 -3.910662325514766E-13 -1.642343375134055E-15 -1.725951117264927E-13 -1.071971374239487E-15
tp 1.848078049485828E-13 -3.910662325514766E-13 6.312581731071947E-9 9.444306767081806E-15 1.350361921877523E-9 1.303661805528907E-12
node 6.540829230088874E-16 -1.642343375134055E-15 9.444306767081806E-15 8.391747624216027E-10 -8.3353149813003E-10 -1.847662593483077E-11
peri 6.797417280614249E-14 -1.725951117264927E-13 1.350361921877523E-9 -8.3353149813003E-10 1.125873726650457E-9 1.861353512907671E-11
i 3.488439262223599E-16 -1.071971374239487E-15 1.303661805528907E-12 -1.847662593483077E-11 1.861353512907671E-11 1.929800925474949E-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-August); 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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