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237276 Nakama (2008 XD2)
Classification: Main-belt Asteroid          SPK-ID: 2237276
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1970526067443863 6.9525e-08  
a 2.554487050226404 2.2335e-08 au
q 2.051118718084513 1.7476e-07 au
i 14.07777794967616 6.6824e-06 deg
node 93.97844665609811 2.0484e-05 deg
peri 177.5498544544657 2.4556e-05 deg
M 183.8198400937608 1.8251e-05 deg
tp 2460126.307772023270
(2023-Jun-30.80777202)
8.2031e-05 TDB
period 1491.262115258603
4.08
1.9558e-05
5.355e-08
d
yr
n .2414062533450544 3.1661e-09 deg/d
Q 3.057855382368295 2.6736e-08 au
  Orbit Determination Parameters
   # obs. used (total)      445  
   data-arc span      6903 days (18.90 yr)  
   first obs. used      2002-02-21  
   last obs. used      2021-01-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5391  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 15:42:52  

Additional Information
 Earth MOID = 1.03483 au 
 Jupiter MOID = 2.063 au 
 T_jup = 3.370 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458130.5 (2018-Jan-12.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1975200914791989 6.9405e-08  
q 2.049160885173008 1.7441e-07 au
tp 2458635.705765033832
(2019-Jun-01.20576503)
6.9491e-05 TDB
node 93.9827358297911 2.0492e-05 deg
peri 177.679168146221 2.4557e-05 deg
i 14.07736420716296 6.6831e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      445  
   data-arc span      6903 days (18.90 yr)  
   first obs. used      2002-02-21  
   last obs. used      2021-01-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5391  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 15:42:52  

Additional Information
 Jupiter MOID = 2.063 au 
 T_jup = 3.370 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.817118221028575E-15 -1.204350236142452E-14 1.144991892413449E-12 1.819903333929789E-14 2.295992936144496E-14 1.23928005174013E-14
q -1.204350236142452E-14 3.041790024804383E-14 -2.246166502565069E-12 -4.988905358075244E-14 4.204492704310231E-14 -3.101282270573411E-14
tp 1.144991892413449E-12 -2.246166502565069E-12 4.829060648787669E-9 -2.153733112983517E-11 9.390061765663507E-10 1.221263305721968E-12
node 1.819903333929789E-14 -4.988905358075244E-14 -2.153733112983517E-11 4.19903664887001E-10 -4.113985006237504E-10 -3.943389039378475E-11
peri 2.295992936144496E-14 4.204492704310231E-14 9.390061765663507E-10 -4.113985006237504E-10 6.030492472641324E-10 3.791515832501115E-11
i 1.23928005174013E-14 -3.101282270573411E-14 1.221263305721968E-12 -3.943389039378475E-11 3.791515832501115E-11 4.466426094710418E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.91   n/a MPCxxxxx  
diameter diameter 4.117 km 0.232 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.060   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

237276 Nakama           Discovered 2008 Dec. 2 by T. Seki at Geisei.
Nakama is a Japanese word meaning a group of persons who spontaneously come together and work for common purposes in education, community services, and other fields of work. The name was suggested by R. Sakamoto.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20110517/MPCPages.arcLast Updated: 2011-06-24

Alternate Designations
 2008 XD2 = 2006 DL114 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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