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

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05779017531616008 3.4916e-08  
a 2.91664569079262 1.2779e-08 au
q 2.748092224986592 1.0209e-07 au
i 1.480660051542347 3.5517e-06 deg
node 342.1741137676394 0.00015513 deg
peri 18.58454089600052 0.00015911 deg
M 90.05534294559958 3.5209e-05 deg
tp 2458545.374757883882
(2019-Mar-02.87475788)
0.00017853 TDB
period 1819.38219102422
4.98
1.1957e-05
3.274e-08
d
yr
n .1978693656429265 1.3004e-09 deg/d
Q 3.085199156598649 1.3517e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2953  
   data-arc span      33084 days (90.58 yr)  
   first obs. used      1929-09-29  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43908  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:43:44  

Additional Information
 Earth MOID = 1.74453 au 
 Jupiter MOID = 2.20226 au 
 T_jup = 3.278 
[ 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-August); 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 ]
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