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JPL Small-Body Database Browser
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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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06688755714682862 3.4638e-08  
a 3.010955050042396 1.1881e-08 au
q 2.809559622066153 1.0524e-07 au
i 19.38764896694671 4.2958e-06 deg
node 181.1735014002416 1.1765e-05 deg
peri 288.7383108051472 3.4551e-05 deg
M 73.31667787356162 3.1821e-05 deg
tp 2458611.853185709204
(2019-May-08.35318571)
0.0001687 TDB
period 1908.335963966801
5.22
1.1295e-05
3.092e-08
d
yr
n .1886460281614558 1.1165e-09 deg/d
Q 3.21235047801864 1.2675e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2516  
   data-arc span      35209 days (96.40 yr)  
   first obs. used      1923-09-11  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43098  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:00:11  

Additional Information
 Earth MOID = 1.88273 au 
 Jupiter MOID = 1.89391 au 
 T_jup = 3.160 
[ show covariance matrix ]

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 1.92064939454239 1.92064890089579 1.92064988819096 5.76426818627459 5.68724633930716 2429341.552716486 1.17375837396713 159.139940196096 18.6314071905273 -84.1280998769336 4506523.8356489 T 31 CATAB v2.0f-lin.ifort 2020-Feb-22 16:00:22 2020-Feb-22 16:00
2070-Mar-10 21:53 < 00:01 Jupiter 1.89461779281518 1.8946174118627 1.89461817376821 5.9999134998663 5.92493261596263 2477181.411593399 0.912312318258859 134.358973366375 16.977908631453 86.8885743801537 4822885.72410624 T 31 CATAB v2.0f-lin.ifort 2020-Feb-22 16:00:22 2020-Feb-22 16:00
2117-Jan-10 16:24 00:02 Jupiter 1.92859355276639 1.92859287689068 1.92859422864901 5.71888203897597 5.64156256122976 2494288.183365026 1.70310925780935 224.045669343021 18.7516217132145 -82.6006588688202 4449835.37706671 T 31 CATAB v2.0f-lin.ifort 2020-Feb-22 16:00:22 2020-Feb-22 16:00

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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