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1639 Bower (1951 RB)
Classification: Main-belt Asteroid          SPK-ID: 2001639
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1482549661960845 1.2898e-08  
a 2.574661487000209 7.4378e-09 au
q 2.192955135278633 3.2916e-08 au
i 8.443699757844545 2.5805e-07 deg
node 324.1465636004631 2.3356e-06 deg
peri 106.3130096683778 6.7915e-06 deg
M 280.3782246130279 8.9809e-06 deg
tp 2459730.239789951210
(2022-May-30.73978995)
3.8487e-05 TDB
period 1508.963142287508
4.13
6.5388e-06
1.79e-08
d
yr
n .2385744157105515 1.0338e-09 deg/d
Q 2.956367838721786 8.5405e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2710  
   data-arc span      41869 days (114.63 yr)  
   first obs. used      1906-12-21  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38476  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:54:51  

Additional Information
 Earth MOID = 1.22508 au 
 Jupiter MOID = 2.33481 au 
 T_jup = 3.397 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456650.5 (2013-Dec-24.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1502145052882949 1.3121e-08  
q 2.18578440737471 3.3767e-08 au
tp 2456717.213005138564
(2014-Feb-28.71300514)
3.2532e-05 TDB
node 324.217262011389 2.341e-06 deg
peri 106.7421038568567 6.6911e-06 deg
i 8.438399499303676 2.5755e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2710  
   data-arc span      41869 days (114.63 yr)  
   first obs. used      1906-12-21  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38476  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:54:51  

Additional Information
 Jupiter MOID = 2.33481 au 
 T_jup = 3.397 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.721497799763558E-16 -4.358624158029629E-16 3.320132044139253E-13 -2.775042012699262E-15 6.128907196325901E-14 -3.83431244322769E-16
q -4.358624158029629E-16 1.140185317515998E-15 -8.031664441405219E-13 7.169265170975167E-15 -1.449320314531456E-13 9.582838139020782E-16
tp 3.320132044139253E-13 -8.031664441405219E-13 1.058358093305676E-9 4.758370522649525E-13 2.031768088143272E-10 -1.496026899416052E-13
node -2.775042012699262E-15 7.169265170975167E-15 4.758370522649525E-13 5.480511313373628E-12 -5.132358424932352E-12 1.543995272869794E-13
peri 6.128907196325901E-14 -1.449320314531456E-13 2.031768088143272E-10 -5.132358424932352E-12 4.477027860957754E-11 -1.53536847347594E-13
i -3.83431244322769E-16 9.582838139020782E-16 -1.496026899416052E-13 1.543995272869794E-13 -1.53536847347594E-13 6.633096218402279E-14

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.13   n/a MPO636086 IRAS observations used: 7
diameter diameter 35.676 km 0.450 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 22.181 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Polakis, T. (2018) Minor Planet Bull. 45, 112-115.]
geometric albedo albedo 0.031   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
B-V BV 0.677   0.034 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=6.92, mean=7.06, max.=7.20) deg.
U-B UB 0.368   0.049 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=6.92, mean=7.06, max.=7.20) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

1639 Bower (1951 RB)          Discovered 1951-Sep-12 by Arend, S. at Uccle
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1951 RB = 1934 PT = 1936 AC = 1939 XH = 1942 NA = 1951 RV1 = 1951 TE = 1953 DK = 1953 EU1 = 1953 GV = 1957 BJ1 = A906 YD = A924 EN 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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