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1156 Kira (1928 DA)
Classification: Main-belt Asteroid          SPK-ID: 2001156
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04634253920626686 3.2406e-08  
a 2.236756185917047 5.5101e-09 au
q 2.133099224676327 7.1923e-08 au
i 1.39732178620456 3.4767e-06 deg
node 91.13189700040772 0.00014235 deg
peri 355.0175062875239 0.0001476 deg
M 259.9107789084132 3.9601e-05 deg
tp 2459340.212248811225
(2021-May-05.71224881)
0.00013463 TDB
period 1221.873926465403
3.35
4.515e-06
1.236e-08
d
yr
n .2946294148704821 1.0887e-09 deg/d
Q 2.340413147157768 5.7654e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2663  
   data-arc span      33706 days (92.28 yr)  
   first obs. used      1928-02-22  
   last obs. used      2020-06-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42271  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:26:52  

Additional Information
 Earth MOID = 1.1493 au 
 Jupiter MOID = 2.72798 au 
 T_jup = 3.636 
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Orbital Elements at Epoch 2456131.5 (2012-Jul-23.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04605207511670157 3.2526e-08  
q 2.134249986769389 7.2234e-08 au
tp 2455670.790824215326
(2011-Apr-19.29082422)
0.00013321 TDB
node 91.13734576450456 0.00014225 deg
peri 354.2039764898449 0.00014753 deg
i 1.397818204904497 3.478e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2663  
   data-arc span      33706 days (92.28 yr)  
   first obs. used      1928-02-22  
   last obs. used      2020-06-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42271  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:26:52  

Additional Information
 Jupiter MOID = 2.72798 au 
 T_jup = 3.636 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.057954675246381E-15 -2.343480552808155E-15 -2.702001446474306E-13 4.537040276642632E-15 -1.071647587736935E-13 1.016663011564513E-16
q -2.343480552808155E-15 5.21779504843514E-15 6.717807604103847E-13 -1.040672208084118E-14 2.611087007249353E-13 -2.171831847719362E-16
tp -2.702001446474306E-13 6.717807604103847E-13 1.774401574972616E-8 -1.541828453266279E-11 5.22440625067881E-9 -6.305422186953224E-13
node 4.537040276642632E-15 -1.040672208084118E-14 -1.541828453266279E-11 2.023376340171439E-8 -2.023195606025237E-8 -5.627103455043008E-11
peri -1.071647587736935E-13 2.611087007249353E-13 5.22440625067881E-9 -2.023195606025237E-8 2.176634635674515E-8 5.606540768579968E-11
i 1.016663011564513E-16 -2.171831847719362E-16 -6.305422186953224E-13 -5.627103455043008E-11 5.606540768579968E-11 1.209641769127162E-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 12.4   n/a MPO492763  
diameter diameter 6.831 km 0.211 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 2.9710 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2012) http://www.asu.cas.cz/~ppravec/neo.htm]
geometric albedo albedo 0.181   0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1156 Kira (1928 DA)          Discovered 1928-Feb-22 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1928 DA = 1935 FY = 1938 DA = 1953 RC1 = 1955 FW1 = 1973 QC2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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