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21695 Hannahwolf (1999 RG49)
Classification: Main-belt Asteroid          SPK-ID: 2021695
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2158978325817021 3.9484e-08  
a 2.439958327779905 8.5933e-09 au
q 1.913176613222549 9.7911e-08 au
i 3.33147551610124 4.3872e-06 deg
node 112.4985089575968 7.2889e-05 deg
peri 212.7438138966541 7.3523e-05 deg
M 212.3085055338048 1.1085e-05 deg
tp 2459771.616917270318
(2022-Jul-11.11691727)
4.4289e-05 TDB
period 1392.105151081496
3.81
7.3543e-06
2.013e-08
d
yr
n .2586011550351092 1.3662e-09 deg/d
Q 2.966740042337261 1.0449e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1253  
   data-arc span      16329 days (44.71 yr)  
   first obs. used      1976-06-30  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5583  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:51:46  

Additional Information
 Earth MOID = .900229 au 
 Jupiter MOID = 2.3718 au 
 T_jup = 3.468 
[ 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 15.01   n/a E2021B10  
diameter diameter 2.178 km 0.191 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.372   0.120 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

21695 Hannahwolf           Discovered 1999 Sept. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Hannah Louise Wolf (b. 1990) was awarded first place and Best in Category in the 2006 Intel International Science and Engineering Fair for her earth science project. She also received the Intel Foundation Young Scientist Award. She attends the Parkland High School, Allentown, Pennsylvania, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060711/MPCPages.arcLast Updated: 2006-07-17

Alternate Designations
 1999 RG49 = 1976 MP = 1998 GY12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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