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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 | Close-Approach Data ]

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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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1498236207755105 3.8663e-08  
a 2.573063148636405 7.831e-09 au
q 2.187557511223663 1e-07 au
i 8.439533226512042 4.6315e-06 deg
node 324.1734162197131 3.1937e-05 deg
peri 106.2351641579949 3.6621e-05 deg
M 186.0612152410801 1.79e-05 deg
tp 2459728.896792880501
(2022-May-29.39679288)
7.6098e-05 TDB
period 1507.558224006352
4.13
6.8823e-06
1.884e-08
d
yr
n .2387967471288081 1.0902e-09 deg/d
Q 2.958568786049147 9.0043e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2396  
   data-arc span      41502 days (113.63 yr)  
   first obs. used      1906-12-21  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39633  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:38:10  

Additional Information
 Earth MOID = 1.2199 au 
 Jupiter MOID = 2.33408 au 
 T_jup = 3.398 
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Orbital Elements at Epoch 2456174.5 (2012-Sep-04.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1500178051778598 3.8612e-08  
q 2.186703993587365 9.9645e-08 au
tp 2456716.919740544629
(2014-Feb-28.41974054)
7.2415e-05 TDB
node 324.2197363899587 3.1961e-05 deg
peri 106.6236984634724 3.6608e-05 deg
i 8.437085469034812 4.6289e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2396  
   data-arc span      41502 days (113.63 yr)  
   first obs. used      1906-12-21  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39633  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:38:10  

Additional Information
 Jupiter MOID = 2.33408 au 
 T_jup = 3.398 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.490863021921046E-15 -3.838527248687603E-15 -9.819180338714729E-13 -2.883903058138246E-15 -2.732457653472849E-13 -1.575352725759242E-15
q -3.838527248687603E-15 9.929078793757219E-15 2.581488841678363E-12 7.493214074188012E-15 7.098885725522412E-13 4.267676924446589E-15
tp -9.819180338714729E-13 2.581488841678363E-12 5.243961495920755E-9 2.35236000901952E-14 1.315234742783759E-9 2.242154194726353E-12
node -2.883903058138246E-15 7.493214074188012E-15 2.35236000901952E-14 1.021532601618847E-9 -1.009939285512532E-9 5.053013248646872E-11
peri -2.732457653472849E-13 7.098885725522412E-13 1.315234742783759E-9 -1.009939285512532E-9 1.340137539766412E-9 -4.945933106285912E-11
i -1.575352725759242E-15 4.267676924446589E-15 2.242154194726353E-12 5.053013248646872E-11 -4.945933106285912E-11 2.142628887526293E-11

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 11.1   n/a MPO473786 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. 2019-August); 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

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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 | Close-Approach Data ]
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