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4059 Balder (1987 SB5)
Classification: Main-belt Asteroid          SPK-ID: 2004059
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06847367772595359 1.0078e-08  
a 3.018960476956348 1.4054e-08 au
q 2.812241150189847 3.6962e-08 au
i 9.463920505757132 4.1559e-07 deg
node 238.0697816614563 2.397e-06 deg
peri 30.40040672744537 1.8555e-05 deg
M 206.5367412744386 2.0855e-05 deg
tp 2460017.244997792955
(2023-Mar-13.74499779)
0.00011182 TDB
period 1915.951750583343
5.25
1.3379e-05
3.663e-08
d
yr
n .187896172171555 1.3121e-09 deg/d
Q 3.225679803722848 1.5016e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3090  
   data-arc span      24406 days (66.82 yr)  
   first obs. used      1954-05-23  
   last obs. used      2021-03-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40646  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:23:21  

Additional Information
 Earth MOID = 1.7995 au 
 Jupiter MOID = 1.82863 au 
 T_jup = 3.223 
[ 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 11.52   n/a E2021B10  
diameter diameter 17.019 km 0.206 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 9.7215 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2018) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.097   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4059 Balder (1987 SB5)          Discovered 1987-Sep-29 by Jensen, P. at Brorfelde
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1987 SB5 = 1956 XQ = 1977 TC4 = 1977 TM7 = 1977 VG2 = 1983 XW1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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