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4745 Nancymarie (1989 NG1)
Classification: Main-belt Asteroid          SPK-ID: 2004745
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06147167913717556 1.961e-08  
a 3.018395529429632 1.3105e-08 au
q 2.832849687935449 6.1803e-08 au
i 8.68107308767625 1.0012e-06 deg
node 238.7131995792359 6.3294e-06 deg
peri 66.03105971919064 2.6726e-05 deg
M 352.874593555529 2.0943e-05 deg
tp 2459238.411397322739
(2021-Jan-23.91139732)
0.00011142 TDB
period 1915.413968669328
5.24
1.2474e-05
3.415e-08
d
yr
n .1879489269100916 1.224e-09 deg/d
Q 3.203941370923816 1.3911e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2279  
   data-arc span      16851 days (46.14 yr)  
   first obs. used      1974-09-22  
   last obs. used      2020-11-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45614  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:42:42  

Additional Information
 Earth MOID = 1.82958 au 
 Jupiter MOID = 1.93877 au 
 T_jup = 3.227 
[ 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 12.18   n/a E2021B10  
diameter diameter 12.870 km 0.224 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 13.8011 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.170   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

4745 Nancymarie (1989 NG1)          Discovered 1989-Jul-09 by Holt, H. E. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1989 NG1 = 1974 SY3 = 1979 RF1 = 1980 WY1 = 1990 VJ8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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