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7677 Sawa (1995 YP3)
Classification: Main-belt Asteroid          SPK-ID: 2007677
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1046525422330154 3.2899e-08  
a 2.433198081153051 7.6185e-09 au
q 2.17855771620389 8.2404e-08 au
i 2.402212250677203 3.0959e-06 deg
node 133.5904268855656 8.4269e-05 deg
peri 221.9500426000825 8.5554e-05 deg
M 260.9553597850378 1.5345e-05 deg
tp 2459381.910902273259
(2021-Jun-16.41090227)
5.9307e-05 TDB
period 1386.323626602772
3.80
6.511e-06
1.783e-08
d
yr
n .2596796253715958 1.2196e-09 deg/d
Q 2.687838446102213 8.4158e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2565  
   data-arc span      14881 days (40.74 yr)  
   first obs. used      1979-09-20  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47491  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 16:43:02  

Additional Information
 Earth MOID = 1.17436 au 
 Jupiter MOID = 2.70711 au 
 T_jup = 3.497 
[ show covariance matrix ]

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 13.9   n/a MPO365341  
rotation period rot_per 3.00 h n/a LCDB (Rev. 2019-August); 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:
[Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.]

7677 Sawa           Discovered 1995 Dec. 27 by T. Kobayashi at Oizumi.
Takeyasu Sawa (b. 1949), professor of education at Aichi University, is a specialist in research on galaxies and astronomy education. Currently he is president of the Society for Teaching and Popularization of Astronomy.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030614/MPCPages.arcLast Updated: 2005-04-26

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Alternate Designations
 1995 YP3 = 1979 SS14 = 1983 UR 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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