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27766 (1991 TO)
Classification: Main-belt Asteroid          SPK-ID: 2027766
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1150946327344658 3.3384e-08  
a 2.257069187979426 7.4946e-09 au
q 1.997292638732655 7.5305e-08 au
i 5.140931564060397 3.4967e-06 deg
node 121.9024026078955 3.8878e-05 deg
peri 246.7549644152921 4.1455e-05 deg
M 164.9508283626805 1.4475e-05 deg
tp 2458432.997557411994
(2018-Nov-10.49755741)
4.9309e-05 TDB
period 1238.556249517476
3.39
6.169e-06
1.689e-08
d
yr
n .2906610015816811 1.4477e-09 deg/d
Q 2.516845737226197 8.3572e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1333  
   data-arc span      10478 days (28.69 yr)  
   first obs. used      1991-09-12  
   last obs. used      2020-05-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51676  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:21:21  

Additional Information
 Earth MOID = 1.00238 au 
 Jupiter MOID = 2.9388 au 
 T_jup = 3.609 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457167.5 (2015-May-25.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1150541070334659 3.3466e-08  
q 1.997583855162694 7.5505e-08 au
tp 2457192.128688797722
(2015-Jun-18.62868880)
4.8683e-05 TDB
node 121.9687775724293 3.8862e-05 deg
peri 246.1921977279283 4.1433e-05 deg
i 5.14172391763477 3.4979e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1333  
   data-arc span      10478 days (28.69 yr)  
   first obs. used      1991-09-12  
   last obs. used      2020-05-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51676  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:21:21  

Additional Information
 Jupiter MOID = 2.9388 au 
 T_jup = 3.609 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.119976943441521E-15 -2.51717531760511E-15 -1.105203124565924E-13 1.55408822596525E-15 -5.07704797851412E-14 -5.343627685044528E-16
q -2.51717531760511E-15 5.701064396813052E-15 2.606673772587518E-13 -3.59180341923067E-15 1.163875194897455E-13 1.318048807837126E-15
tp -1.105203124565924E-13 2.606673772587518E-13 2.370009800278547E-9 -1.009887188445475E-11 7.098909081239896E-10 -1.545616271825404E-13
node 1.55408822596525E-15 -3.59180341923067E-15 -1.009887188445475E-11 1.510285985196052E-9 -1.506854410219078E-9 2.076929267779351E-11
peri -5.07704797851412E-14 1.163875194897455E-13 7.098909081239896E-10 -1.506854410219078E-9 1.716709404322501E-9 -2.074049722705995E-11
i -5.343627685044528E-16 1.318048807837126E-15 -1.545616271825404E-13 2.076929267779351E-11 -2.074049722705995E-11 1.223565377226066E-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 15.6   n/a MPO449167  
diameter diameter 2.193 km 0.239 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 49.4584 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.278   0.057 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

27766 (1991 TO)          Discovered 1991-Oct-01 by McNaught, R. H. at Siding Spring
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 TO = 1997 LA14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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