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2115 Irakli (1976 UD)
Classification: Main-belt Asteroid          SPK-ID: 2002115
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05118122773155876 2.463e-08  
a 3.01356740680886 1.2589e-08 au
q 2.859329327076573 7.4768e-08 au
i 8.972730074435898 4.3757e-07 deg
node 241.4136243550792 1.9649e-06 deg
peri 340.0951951851944 1.8716e-05 deg
M 53.67863846742622 1.6955e-05 deg
tp 2458915.582724418735
(2020-Mar-07.08272442)
8.9889e-05 TDB
period 1910.820060600046
5.23
1.1973e-05
3.278e-08
d
yr
n .1884007853083512 1.1805e-09 deg/d
Q 3.167805486541148 1.3233e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2928  
   data-arc span      30864 days (84.50 yr)  
   first obs. used      1936-04-17  
   last obs. used      2020-10-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41465  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:21:05  

Additional Information
 Earth MOID = 1.85027 au 
 Jupiter MOID = 1.83675 au 
 T_jup = 3.228 
[ 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 11.17   n/a E2021B10 IRAS observations used: 2
diameter diameter 21.381 km 0.276 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 29.765 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 0.155   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

2115 Irakli (1976 UD)          Discovered 1976-Oct-24 by West, R. M. at La Silla
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1976 UD = 1948 PY = 1952 HZ3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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