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15891 Alissazhang (1997 GG7)
Classification: Main-belt Asteroid          SPK-ID: 2015891
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2002891723452073 5.1492e-08  
a 2.317207831647397 6.5076e-09 au
q 1.853096192894908 1.2012e-07 au
i 4.376072591440867 4.695e-06 deg
node 181.22867912 3.9108e-05 deg
peri 169.779244819548 3.9971e-05 deg
M 139.1331506958115 8.1534e-06 deg
tp 2458702.563425276653
(2019-Aug-07.06342528)
2.9403e-05 TDB
period 1288.385737000359
3.53
5.4274e-06
1.486e-08
d
yr
n .2794194235944882 1.1771e-09 deg/d
Q 2.781319470399887 7.811e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1468  
   data-arc span      10695 days (29.28 yr)  
   first obs. used      1991-12-03  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5404  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:12:05  

Additional Information
 Earth MOID = .845859 au 
 Jupiter MOID = 2.65507 au 
 T_jup = 3.549 
[ 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 15.05   n/a E2021B10  

15891 Alissazhang           Discovered 1997 Apr. 2 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Alissa Yuan Zhang (b. 1994) is a finalist in the 2012 Intel Science Talent Search, a science competition for high-school seniors, for her chemistry project. She attends the Saratoga High School, Saratoga, California.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120506/MPCPages.arcLast Updated: 2012-05-09

Alternate Designations
 1997 GG7 = 1998 WL11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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