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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 84 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1390504169578378 1.2341e-08  
a 2.697506955808428 4.8539e-09 au
q 2.322417488856598 3.3752e-08 au
i 10.24471447858802 6.5707e-07 deg
node 170.8336980391721 2.3074e-06 deg
peri 139.0312655101027 7.9785e-06 deg
M 108.6886094555831 6.7358e-06 deg
tp 2458907.933349854538
(2020-Feb-28.43334985)
3.0195e-05 TDB
period 1618.237595764288
4.43
4.3678e-06
1.196e-08
d
yr
n .2224642419273254 6.0045e-10 deg/d
Q 3.072596422760257 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-Aug-25 06:54:32  

Additional Information
 Earth MOID = 1.31901 au 
 Jupiter MOID = 2.26959 au 
 T_jup = 3.332 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456350.5 (2013-Feb-27.0) TDB
Reference: JPL 84 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1383140867311056 1.2444e-08  
q 2.325821639793949 3.4288e-08 au
tp 2455674.195824115974
(2011-Apr-22.69582412)
3.1964e-05 TDB
node 170.9483642235541 2.3064e-06 deg
peri 139.6790494067132 8.0473e-06 deg
i 10.23889780455195 6.5614e-07 deg
  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-Aug-25 06:54:32  

Additional Information
 Jupiter MOID = 2.26959 au 
 T_jup = 3.332 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.548523869344942E-16 -4.233745190109663E-16 1.318424846745793E-13 4.222087030553177E-15 3.519943793133168E-14 2.140923557908713E-15
q -4.233745190109663E-16 1.175683679090962E-15 -4.0381291459369E-13 -1.282891947793355E-14 -1.025322437005689E-13 -5.751466591968136E-15
tp 1.318424846745793E-13 -4.0381291459369E-13 1.021667818640546E-9 3.29382489843173E-11 2.487091034021255E-10 -1.009040679402599E-11
node 4.222087030553177E-15 -1.282891947793355E-14 3.29382489843173E-11 5.31941084758759E-12 4.661914461339996E-12 4.107730971223319E-13
peri 3.519943793133168E-14 -1.025322437005689E-13 2.487091034021255E-10 4.661914461339996E-12 6.475877582962015E-11 -3.179656959318009E-12
i 2.140923557908713E-15 -5.751466591968136E-15 -1.009040679402599E-11 4.107730971223319E-13 -3.179656959318009E-12 4.305236298101958E-13

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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