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JPL Small-Body Database Browser
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923 Herluga (A919 SK)
Classification: Main-belt Asteroid          SPK-ID: 2000923
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .196133347739772 3.6543e-08  
a 2.614646624575822 1.0368e-08 au
q 2.101827228941271 9.6037e-08 au
i 14.47355693594478 4.5392e-06 deg
node 197.6151582250399 1.4903e-05 deg
peri 201.105866233784 1.8126e-05 deg
M 175.3100983190279 1.1757e-05 deg
tp 2457848.492172086046
(2017-Apr-04.99217209)
4.8739e-05 TDB
period 1544.251133533473
4.23
9.1851e-06
2.515e-08
d
yr
n .2331227040619146 1.3866e-09 deg/d
Q 3.127466020210373 1.2401e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2233  
   data-arc span      36382 days (99.61 yr)  
   first obs. used      1919-09-30  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40703  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:16:04  

Additional Information
 Earth MOID = 1.1133 au 
 Jupiter MOID = 2.32344 au 
 T_jup = 3.336 
[ 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 11.50   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11
diameter diameter 34.553 km 0.269 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 19.746 h n/a LCDB (Rev. 2019-January); 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:
[Brinsfield, J.W. (2009) Minor Planet Bull. 36, 64-66.]
geometric albedo albedo 0.037   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

923 Herluga (A919 SK)          Discovered 1919-Sep-30 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A919 SK = A915 VD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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