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27738 (1990 TT4)
Classification: Main-belt Asteroid          SPK-ID: 2027738
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2369772763086206 4.0308e-08  
a 3.135729246761874 1.4735e-08 au
q 2.392632670622962 1.2552e-07 au
i 10.87528536062644 4.2046e-06 deg
node 163.2129486384963 1.9581e-05 deg
peri 234.6152777892657 2.0784e-05 deg
M 178.1803911824672 8.4246e-06 deg
tp 2458392.661913558597
(2018-Oct-01.16191356)
4.4231e-05 TDB
period 2028.178907458054
5.55
1.4296e-05
3.914e-08
d
yr
n .1774991341622782 1.2511e-09 deg/d
Q 3.878825822900786 1.8227e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2036  
   data-arc span      11205 days (30.68 yr)  
   first obs. used      1990-10-09  
   last obs. used      2021-06-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47976  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 05:57:09  

Additional Information
 Earth MOID = 1.41754 au 
 Jupiter MOID = 1.67286 au 
 T_jup = 3.141 
[ 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 13.25   n/a E2020-QM5  
diameter diameter 14.529 km 0.150 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 26.4684 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 0.048   0.002 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

27738 (1990 TT4)          Discovered 1990-Oct-09 by McNaught, R. H. at Siding Spring
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1990 TT4 = 1990 TY15 = 1998 DR34 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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