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JPL Small-Body Database Browser
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27761 (1991 RL13)
Classification: Main-belt Asteroid          SPK-ID: 2027761
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1757830030583726 5.5699e-08  
a 2.212682383291859 7.5789e-09 au
q 1.823730429142459 1.2276e-07 au
i 2.39366317679659 4.2401e-06 deg
node 293.8213928310256 0.00010326 deg
peri 32.03549122582435 0.00010369 deg
M 280.9093898795338 1.0944e-05 deg
tp 2459264.618893462159
(2021-Feb-19.11889346)
3.7207e-05 TDB
period 1202.200887078157
3.29
6.1767e-06
1.691e-08
d
yr
n .2994507855296531 1.5385e-09 deg/d
Q 2.60163433744126 8.9112e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1015  
   data-arc span      10366 days (28.38 yr)  
   first obs. used      1991-09-13  
   last obs. used      2020-01-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56286  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 01:09:38  

Additional Information
 Earth MOID = .812357 au 
 Jupiter MOID = 2.71853 au 
 T_jup = 3.634 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456445.5 (2013-Jun-02.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1762490574222068 5.5846e-08  
q 1.822545341260613 1.2312e-07 au
tp 2456858.922519641385
(2014-Jul-20.42251964)
3.2537e-05 TDB
node 293.9488076697048 0.00010308 deg
peri 31.73514537416422 0.0001035 deg
i 2.396052751884005 4.2449e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1015  
   data-arc span      10366 days (28.38 yr)  
   first obs. used      1991-09-13  
   last obs. used      2020-01-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56286  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 01:09:38  

Additional Information
 Jupiter MOID = 2.71853 au 
 T_jup = 3.634 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.118776019500919E-15 -6.866893294595991E-15 5.97842949749079E-13 6.921206029666766E-15 6.955539176059401E-14 -3.588831677517843E-15
q -6.866893294595991E-15 1.515840414908427E-14 -1.283769308464071E-12 -1.420527355750715E-14 -1.495012798282036E-13 7.969881298649338E-15
tp 5.97842949749079E-13 -1.283769308464071E-12 1.058654084282107E-9 1.864621521197792E-12 3.119910610771837E-10 -1.250795742092408E-12
node 6.921206029666766E-15 -1.420527355750715E-14 1.864621521197792E-12 1.062528635522153E-8 -1.061570310567369E-8 1.828064911484805E-10
peri 6.955539176059401E-14 -1.495012798282036E-13 3.119910610771837E-10 -1.061570310567369E-8 1.071181417491208E-8 -1.82943852628306E-10
i -3.588831677517843E-15 7.969881298649338E-15 -1.250795742092408E-12 1.828064911484805E-10 -1.82943852628306E-10 1.801883028695322E-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 15.3   n/a MPO259532  
diameter diameter 2.431 km 0.125 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.227   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

27761 (1991 RL13)          Discovered 1991-Sep-13 by Holt, H. E. at Palomar
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 RL13 = 1998 XT34 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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