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20691 (1999 VY72)
Classification: Mars-crossing Asteroid          SPK-ID: 2020691
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3112038405030995 1.3427e-08  
a 2.36419210035556 7.9501e-09 au
q 1.628446439037821 3.2651e-08 au
i 22.21028868451888 5.3924e-07 deg
node 110.9999260744359 1.5632e-06 deg
peri 254.0509169143709 3.3535e-06 deg
M 312.4657138198816 5.5526e-06 deg
tp 2459375.818217086750
(2021-Jun-10.31821709)
2.1095e-05 TDB
period 1327.769137251253
3.64
6.6974e-06
1.834e-08
d
yr
n .2711314715036018 1.3676e-09 deg/d
Q 3.099937761673299 1.0424e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2176  
   data-arc span      10138 days (27.76 yr)  
   first obs. used      1992-12-26  
   last obs. used      2020-09-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4178  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:27:14  

Additional Information
 Earth MOID = .753742 au 
 Jupiter MOID = 2.66141 au 
 T_jup = 3.387 
[ 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 13.45   n/a E2021B10  
rotation period rot_per 2.6990 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2010) http://www.asu.cas.cz/~ppravec/neo.htm]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Skiff, B.A. (2011) Posting on CALL web site. http://www.minorplanet.info/call.html]
[Stephens, R.D. (2014) Minor Planet Bull. 41, 13-15.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Skiff, B.A.; McLelland, K.P.; Sanborn, J.; Pravec, P.; Koehn, B.W. (2019). Minor Planet Bull. 46, 458-503.]

20691 (1999 VY72)          Discovered 1999-Nov-11 by McNaught, R. H. at Siding Spring
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 VY72 = 1992 YT2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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