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17609 (1995 UR)
Classification: Main-belt Asteroid          SPK-ID: 2017609
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2064347105914673 2.0212e-08  
a 2.300773669839919 9.1964e-09 au
q 1.825814123170048 4.7708e-08 au
i 25.3464599885584 1.2945e-06 deg
node 297.7011950203737 3.1946e-06 deg
peri 155.8352764148705 6.8875e-06 deg
M 34.09143890748672 7.9922e-06 deg
tp 2459079.787538449236
(2020-Aug-18.28753845)
2.8132e-05 TDB
period 1274.703783439653
3.49
7.6427e-06
2.092e-08
d
yr
n .2824185545512214 1.6933e-09 deg/d
Q 2.775733216509791 1.1095e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1254  
   data-arc span      24614 days (67.39 yr)  
   first obs. used      1953-10-31  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42056  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:34:39  

Additional Information
 Earth MOID = .857769 au 
 Jupiter MOID = 2.41128 au 
 T_jup = 3.438 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457762.5 (2017-Jan-09.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2054714689269196 2.0179e-08  
q 1.828290996048034 4.7587e-08 au
tp 2457804.509569809640
(2017-Feb-20.00956981)
2.7666e-05 TDB
node 297.7643898339805 3.198e-06 deg
peri 155.6644843206721 6.9224e-06 deg
i 25.32661849940782 1.2938e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1254  
   data-arc span      24614 days (67.39 yr)  
   first obs. used      1953-10-31  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42056  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:34:39  

Additional Information
 Jupiter MOID = 2.41128 au 
 T_jup = 3.438 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.07188680009215E-16 -9.489376193607551E-16 -2.748555889159667E-13 -1.119609205915901E-14 -3.572807444571664E-14 -7.869651737151773E-16
q -9.489376193607551E-16 2.264492692421429E-15 6.206276070522237E-13 2.60315009958048E-14 7.468059526947494E-14 1.016818414190133E-15
tp -2.748555889159667E-13 6.206276070522237E-13 7.654005117795512E-10 -1.411654821930472E-11 1.732050830190671E-10 1.654600504659974E-11
node -1.119609205915901E-14 2.60315009958048E-14 -1.411654821930472E-11 1.022744996483937E-11 -1.130552517992614E-11 -1.203032205399677E-12
peri -3.572807444571664E-14 7.468059526947494E-14 1.732050830190671E-10 -1.130552517992614E-11 4.791912585629763E-11 4.325175530286057E-12
i -7.869651737151773E-16 1.016818414190133E-15 1.654600504659974E-11 -1.203032205399677E-12 4.325175530286057E-12 1.673853112883447E-12

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.20   n/a MPCxxxxx  
diameter diameter 3.928 km 0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 6.545 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.]
geometric albedo albedo 0.243   0.050 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

17609 (1995 UR)          Discovered 1995-Oct-18 by Spahr, T. B. at Catalina Station
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1995 UR = 1998 QX26 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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