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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 78 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1393084910332335 2.927e-08  
a 2.697521296058165 6.3378e-09 au
q 2.32173367477429 7.9215e-08 au
i 10.24447100439468 3.6672e-06 deg
node 170.8366376090951 1.636e-05 deg
peri 138.9689405654391 2.1015e-05 deg
M 20.62117761256115 1.3349e-05 deg
tp 2458907.804913945414
(2020-Feb-28.30491395)
5.9859e-05 TDB
period 1618.250499880466
4.43
5.7031e-06
1.561e-08
d
yr
n .2224624679717953 7.8401e-10 deg/d
Q 3.073308917342041 7.2207e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3079  
   data-arc span      39216 days (107.37 yr)  
   first obs. used      1913-07-02  
   last obs. used      2020-11-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39858  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:55:23  

Additional Information
 Earth MOID = 1.31897 au 
 Jupiter MOID = 2.27017 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 10.8   n/a MPO492757 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

[ 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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