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1618 Dawn (1948 NF)
Classification: Main-belt Asteroid          SPK-ID: 2001618
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02766482803540306 2.837e-08  
a 2.868001889559213 9.6203e-09 au
q 2.788659110479347 8.4065e-08 au
i 3.224914814414412 3.081e-06 deg
node 102.9284970211886 8.0281e-05 deg
peri 183.318467162602 0.00011997 deg
M 287.9777524890322 9.0186e-05 deg
tp 2459355.421040090193
(2021-May-20.92104009)
0.00044444 TDB
period 1774.057028878638
4.86
8.9262e-06
2.444e-08
d
yr
n .202924705429313 1.021e-09 deg/d
Q 2.947344668639079 9.8864e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3020  
   data-arc span      34168 days (93.55 yr)  
   first obs. used      1927-02-09  
   last obs. used      2020-08-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42753  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:17:09  

Additional Information
 Earth MOID = 1.77224 au 
 Jupiter MOID = 2.08314 au 
 T_jup = 3.296 
[ 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 11.2   n/a MPO384762  
diameter diameter 17.495 km 0.168 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 43.64 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Slivan, S.M.; Binzel, R.P.; Boroumand, S.C.; Pan M.W.; et al. (2008) Icarus 195, 226-276.]
[Hanus, J.; Broz, M.; Durech, J.; Warner, B.D.; et al. (2013) Astron. Astrophys. 559, A134.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
[Polakis, T. (2020) Minor Planet Bull. 47, 314-321.]
geometric albedo albedo 0.145   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
SMASSII spectral type spec_B S   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)

1618 Dawn (1948 NF)          Discovered 1948-Jul-05 by Johnson, E. L. at Johannesburg (UO)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1948 NF = 1927 CF = 1951 AK = 1952 HF = 1964 VH2 = 1964 VV 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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