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JPL Small-Body Database Browser
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688 Melanie (A909 QC)
Classification: Main-belt Asteroid          SPK-ID: 2000688
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 73 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1398581443396373 3.4417e-08  
a 2.698118338085801 8.6992e-09 au
q 2.320764514112374 9.623e-08 au
i 10.24252326755289 3.7487e-06 deg
node 170.8969121373623 1.8443e-05 deg
peri 139.1549083611681 2.3094e-05 deg
M 291.4860781522508 1.5217e-05 deg
tp 2458908.581942976270
(2020-Feb-29.08194298)
6.9343e-05 TDB
period 1618.7877803568
4.43
7.8288e-06
2.143e-08
d
yr
n .2223886320173801 1.0755e-09 deg/d
Q 3.075472162059227 9.9158e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2613  
   data-arc span      38810 days (106.26 yr)  
   first obs. used      1913-07-02  
   last obs. used      2019-10-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43377  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:56:06  

Additional Information
 Earth MOID = 1.31711 au 
 Jupiter MOID = 2.26728 au 
 T_jup = 3.332 
[ 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 10.59   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 12
diameter diameter 41.614 km 0.228 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 18.87 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Stephens, R.D. (2012) Minor Planet Bull. 39, 11-12.]
geometric albedo albedo 0.068   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.760   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=18.44 deg.
SMASSII spectral type spec_B C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

688 Melanie (A909 QC)          Discovered 1909-Aug-25 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A909 QC = 1927 SR = 1940 SJ = A917 KD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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