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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 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1302079498134869 3.0282e-08  
a 2.720016561537827 1.0859e-08 au
q 2.365848781601256 8.4672e-08 au
i 6.429656596039067 4.3997e-06 deg
node 4.64669331744077 2.8889e-05 deg
peri 273.3648565729135 3.3589e-05 deg
M 289.932422220356 1.7869e-05 deg
tp 2459319.411626800519
(2021-Apr-14.91162680)
8.1721e-05 TDB
period 1638.535101202555
4.49
9.8124e-06
2.686e-08
d
yr
n .2197084455107422 1.3157e-09 deg/d
Q 3.074184341474398 1.2273e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3063  
   data-arc span      24124 days (66.05 yr)  
   first obs. used      1954-07-28  
   last obs. used      2020-08-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43067  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:06:36  

Additional Information
 Earth MOID = 1.36053 au 
 Jupiter MOID = 2.08597 au 
 T_jup = 3.338 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456884.5 (2014-Aug-15.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1308346249260547 3.0348e-08  
q 2.365684277449436 8.4866e-08 au
tp 2457675.031798699628
(2016-Oct-13.53179870)
7.945e-05 TDB
node 4.765351209163289 2.8964e-05 deg
peri 272.2772371323512 3.3551e-05 deg
i 6.421576551431772 4.3926e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3063  
   data-arc span      24124 days (66.05 yr)  
   first obs. used      1954-07-28  
   last obs. used      2020-08-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43067  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:06:36  

Additional Information
 Jupiter MOID = 2.08597 au 
 T_jup = 3.338 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.209888571819544E-16 -2.560035060288693E-15 1.84452034524016E-13 6.552828469172084E-16 6.79086573115352E-14 3.497868612353138E-16
q -2.560035060288693E-15 7.202266494274849E-15 -3.901886998734457E-13 -1.649790171771194E-15 -1.72426896718718E-13 -1.076419532091874E-15
tp 1.84452034524016E-13 -3.901886998734457E-13 6.312239004496561E-9 -7.621991880919254E-15 1.350333831798803E-9 1.302718232830622E-12
node 6.552828469172084E-16 -1.649790171771194E-15 -7.621991880919254E-15 8.389397066561872E-10 -8.333013567472094E-10 -1.845090582584641E-11
peri 6.79086573115352E-14 -1.72426896718718E-13 1.350333831798803E-9 -8.333013567472094E-10 1.125642825699628E-9 1.858805457580006E-11
i 3.497868612353138E-16 -1.076419532091874E-15 1.302718232830622E-12 -1.845090582584641E-11 1.858805457580006E-11 1.929505794674268E-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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2033-Oct-26 06:06 < 00:01 Amphi 0.041138464613322 0.0411373781805674 0.0411395511216929 3.40395690403222 3.40395686297959 2463896.754367544 0.717748260628336 146.598273436502 41.3710150575212 75.6294540030943 144375.152528848 T 41 CATAB v2.0f-lin.ifort 2020-Nov-13 04:06:44 2020-Nov-13 04:06
2129-Aug-03 09:44 00:03 Amphi 0.04527606771742 0.0452700722616499 0.045282066003883 3.27905993463445 3.2790598959127 2498875.905686751 2.64622108540405 643.015716517788 41.0196265025451 -62.5422515632901 146487.839458175 T 41 CATAB v2.0f-lin.ifort 2020-Nov-13 04:06:44 2020-Nov-13 04:06
2168-Mar-28 14:16 00:01 Juno 0.0150114380178946 0.0150098442958888 0.0150130439503384 8.93701996284743 8.93701987216337 2512993.094302639 1.18187720237741 771.671181177567 37.9690362171354 -84.778563892432 58885.633194322 T 41 CATAB v2.0f-lin.ifort 2020-Nov-13 04:06:44 2020-Nov-13 04:06

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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