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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 83 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1390504169453259 1.2341e-08  
a 2.697506955842458 4.8539e-09 au
q 2.322417488919648 3.3752e-08 au
i 10.24471447856776 6.5707e-07 deg
node 170.83369803914 2.3074e-06 deg
peri 139.0312655081922 7.9785e-06 deg
M 108.6886094479791 6.7358e-06 deg
tp 2458907.933349879473
(2020-Feb-28.43334988)
3.0195e-05 TDB
period 1618.23759579491
4.43
4.3678e-06
1.196e-08
d
yr
n .2224642419231156 6.0045e-10 deg/d
Q 3.072596422765269 5.5288e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3372  
   data-arc span      40748 days (111.56 yr)  
   first obs. used      1909-08-26  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39386  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 11:26:13  

Additional Information
 Earth MOID = 1.31901 au 
 Jupiter MOID = 2.26959 au 
 T_jup = 3.332 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.94   n/a MPCxxxxx 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. 2020-October); 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

Alternate Designations
 A909 QC = 1927 SR = 1940 SJ = A917 KD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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