Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
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 ]

[ hide orbit diagram ]

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.


[ revert to old Java-based viewer ]

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 
[ show covariance matrix ]

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

[ 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 34 CATAB v2.0e-lin.ifort 2019-May-29 22:18:33 2019-May-29 22:19
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 34 CATAB v2.0e-lin.ifort 2019-May-29 22:18:33 2019-May-29 22:19
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 34 CATAB v2.0e-lin.ifort 2019-May-29 22:18:33 2019-May-29 22:19

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Dec-12 01:33 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin