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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 79 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1391321537499425 2.8701e-08  
a 2.697118580286631 6.017e-09 au
q 2.321862663292365 7.7361e-08 au
i 10.24500127876281 3.5938e-06 deg
node 170.8368005128465 1.6082e-05 deg
peri 138.9672390531351 2.0778e-05 deg
M 65.13448955420598 1.3344e-05 deg
tp 2458907.776896195771
(2020-Feb-28.27689620)
5.9538e-05 TDB
period 1617.888127945228
4.43
5.414e-06
1.482e-08
d
yr
n .2225122947513139 7.446e-10 deg/d
Q 3.072374497280898 6.8541e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3232  
   data-arc span      39280 days (107.54 yr)  
   first obs. used      1913-07-02  
   last obs. used      2021-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39097  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:48:50  

Additional Information
 Earth MOID = 1.31716 au 
 Jupiter MOID = 2.27049 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 10.93   n/a E2021B10 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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1940-Jul-11 04:26 < 00:01 Thisb 0.00916616554335634 0.00916355279604487 0.00916878154937745 4.59563457735814 4.59563441549737 2429821.684667229 0.300712630470358 306.252950641808 23.9574804909485 -65.194165377916 51962.9080803634 T 79 CATAB v2.0f-lin.ifort 2021-Feb-24 00:49:00 2021-Feb-24 00:49

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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