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 ]  
2683 Brian (1981 AD1)
Classification: Main-belt Asteroid          SPK-ID: 2002683
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05746960703413779 3.6427e-08  
a 2.915697026361367 1.3402e-08 au
q 2.748133064025775 1.0763e-07 au
i 1.480761101469231 3.9529e-06 deg
node 342.1888180569119 0.00015551 deg
peri 18.41825140396685 0.00015963 deg
M 11.05876160247115 3.6192e-05 deg
tp 2458544.638060141773
(2019-Mar-02.13806014)
0.00018287 TDB
period 1818.494608335541
4.98
1.2538e-05
3.433e-08
d
yr
n .1979659430112395 1.3649e-09 deg/d
Q 3.083260988696959 1.4172e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2696  
   data-arc span      32932 days (90.16 yr)  
   first obs. used      1929-09-29  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4437  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 20:38:28  

Additional Information
 Earth MOID = 1.74363 au 
 Jupiter MOID = 2.20279 au 
 T_jup = 3.279 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.8   n/a MPO332842  
diameter diameter 11.077 km 0.180 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 22.528 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J. (2018) Astron. Astrophys. 620, A91.]
geometric albedo albedo 0.209   0.045 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

2683 Brian (1981 AD1)          Discovered 1981-Jan-10 by Thomas, N. G. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 AD1 = 1929 ST = 1939 UF = 1969 UG2 = 1978 PM 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Dec-09 11:11 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin