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7803 Adachi (1997 EW2)
Classification: Main-belt Asteroid          SPK-ID: 2007803
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04963172114888006 1.7229e-08  
a 2.784789996759789 1.1542e-08 au
q 2.646576076182416 4.7686e-08 au
i 4.997348846399668 7.1237e-07 deg
node 110.6244764188568 1.8005e-06 deg
peri 8.174373109971283 2.3167e-05 deg
M 91.77126344521977 2.2072e-05 deg
tp 2458767.795599094428
(2019-Oct-11.29559909)
0.00010355 TDB
period 1697.411351637222
4.65
1.0553e-05
2.889e-08
d
yr
n .2120876590419674 1.3185e-09 deg/d
Q 2.923003917337161 1.2115e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2502  
   data-arc span      24601 days (67.35 yr)  
   first obs. used      1953-10-10  
   last obs. used      2021-02-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46165  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 20:02:48  

Additional Information
 Earth MOID = 1.66271 au 
 Jupiter MOID = 2.11145 au 
 T_jup = 3.324 
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Orbital Elements at Epoch 2457202.5 (2015-Jun-29.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05046619977355059 1.67e-08  
q 2.6466787923085 4.6206e-08 au
tp 2457079.245141375903
(2015-Feb-25.74514138)
0.00010255 TDB
node 110.6711551439173 1.7971e-06 deg
peri 10.28042082865509 2.3226e-05 deg
i 4.998220687967111 7.1254e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2502  
   data-arc span      24601 days (67.35 yr)  
   first obs. used      1953-10-10  
   last obs. used      2021-02-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46165  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 20:02:48  

Additional Information
 Jupiter MOID = 2.11145 au 
 T_jup = 3.324 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.788832091649875E-16 -7.501403022164618E-16 -1.184771222259814E-12 -5.218862116681208E-15 -2.687610227824631E-13 -1.33392288678596E-15
q -7.501403022164618E-16 2.135005107623211E-15 3.380469941256667E-12 1.465878480860087E-14 7.673687402732248E-13 3.921857086388758E-15
tp -1.184771222259814E-12 3.380469941256667E-12 1.051691076303412E-8 4.810110151543728E-11 2.374535275301689E-9 -6.409959341474633E-12
node -5.218862116681208E-15 1.465878480860087E-14 4.810110151543728E-11 3.229550088387061E-12 7.913148741060763E-12 -8.078925000395378E-13
peri -2.687610227824631E-13 7.673687402732248E-13 2.374535275301689E-9 7.913148741060763E-12 5.394620149096046E-10 -6.571820524698803E-13
i -1.33392288678596E-15 3.921857086388758E-15 -6.409959341474633E-12 -8.078925000395378E-13 -6.571820524698803E-13 5.077163390074735E-13

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.38   n/a E2021B10  
diameter diameter 6.359 km 0.129 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.197 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.251   0.055 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

7803 Adachi           Discovered 1997 Mar. 4 by T. Kobayashi at Oizumi.
Makoto Adachi (b. 1953), an elementary school teacher in Kyoto, has continued regular visual observations of Jupiter and other planets since 1969. He is also director of the Oriental Astronomical Association in charge of the association's activities.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030806/MPCPages.arcLast Updated: 2003-10-02

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Alternate Designations
 1997 EW2 = 1973 AA3 = 1976 UY17 = 1978 EM1 = 1992 CF2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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