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1628 Strobel (A923 RT)
Classification: Main-belt Asteroid          SPK-ID: 2001628
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06688755370008606 3.1247e-08  
a 3.010955050925932 1.1098e-08 au
q 2.809559633268579 9.316e-08 au
i 19.38764897860409 4.2831e-06 deg
node 181.1734985444506 1.0133e-05 deg
peri 288.7383150993157 3.3892e-05 deg
M 73.31667580891957 3.1515e-05 deg
tp 2458611.853196482667
(2019-May-08.35319648)
0.00016718 TDB
period 1908.335964806775
5.22
1.0551e-05
2.889e-08
d
yr
n .1886460280784213 1.043e-09 deg/d
Q 3.212350468583286 1.184e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2867  
   data-arc span      35391 days (96.90 yr)  
   first obs. used      1923-09-11  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4092  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:37:44  

Additional Information
 Earth MOID = 1.88273 au 
 Jupiter MOID = 1.89391 au 
 T_jup = 3.160 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456781.5 (2014-May-04.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06860414046134719 3.1306e-08  
q 2.806754124445666 9.3822e-08 au
tp 2456709.213618226090
(2014-Feb-20.71361823)
0.00016356 TDB
node 181.2174898319427 1.014e-05 deg
peri 289.9533643752086 3.3044e-05 deg
i 19.37447804065575 4.2812e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2867  
   data-arc span      35391 days (96.90 yr)  
   first obs. used      1923-09-11  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4092  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:37:44  

Additional Information
 Jupiter MOID = 1.89391 au 
 T_jup = 3.160 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.800546508452932E-16 -2.919549058293826E-15 6.551602275074329E-13 3.037611807013002E-16 1.109233867439573E-13 -1.161471676577197E-15
q -2.919549058293826E-15 8.802506666171954E-15 -2.218851136801148E-12 -1.852523848710987E-15 -3.817768790276521E-13 2.856532458813914E-15
tp 6.551602275074329E-13 -2.218851136801148E-12 2.675226866471646E-8 -1.16028852423066E-11 5.155920526997656E-9 -1.749598566224633E-12
node 3.037611807013002E-16 -1.852523848710987E-15 -1.16028852423066E-11 1.028282911280135E-10 -9.879228079865402E-11 -1.209008775211279E-12
peri 1.109233867439573E-13 -3.817768790276521E-13 5.155920526997656E-9 -9.879228079865402E-11 1.091874650649687E-9 8.265692838155509E-13
i -1.161471676577197E-15 2.856532458813914E-15 -1.749598566224633E-12 -1.209008775211279E-12 8.265692838155509E-13 1.832890735693229E-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 10.3   n/a MPO502169 IRAS observations used: 12
diameter diameter 59.345 km 0.484 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 9.52 h n/a LCDB (Rev. 2019-August); 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:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.047   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.840   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=6.41 deg.
U-B UB 0.320   0.060 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=6.41 deg.

1628 Strobel (A923 RT)          Discovered 1923-Sep-11 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1939-Mar-19 01:16 00:01 Jupiter 1.92064938842357 1.92064892354164 1.92064985330702 5.76426812119793 5.68724627310214 2429341.552687658 1.10671510055101 149.980487097895 18.2542560713931 -84.5005613164015 4519175.34926248 T 34 CATAB v2.0f-lin.ifort 2020-Aug-24 22:38:02 2020-Aug-24 22:38
2070-Mar-10 21:53 < 00:01 Jupiter 1.89461779074946 1.89461741198311 1.89461816951635 5.99991345093298 5.92493256632778 2477181.411596818 0.860731610684092 126.252454228738 16.8813241131968 86.7044939000176 4845782.12210821 T 34 CATAB v2.0f-lin.ifort 2020-Aug-24 22:38:02 2020-Aug-24 22:38
2117-Jan-10 16:24 00:02 Jupiter 1.92859352577497 1.92859287244161 1.92859417911425 5.71888211502875 5.64156263723534 2494288.183389275 1.6057799197338 210.724740540152 18.3871795212816 -82.4594202539703 4475427.25388644 T 34 CATAB v2.0f-lin.ifort 2020-Aug-24 22:38:02 2020-Aug-24 22:38

Alternate Designations
 A923 RT = 1926 GY = 1947 GC = 1949 QA2 = 1952 DV2 = 1957 CA = 1960 WH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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