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1665 Gaby (1930 DQ)
Classification: Main-belt Asteroid          SPK-ID: 2001665
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 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2074435500833241 1.3705e-08  
a 2.413510951959087 5.8917e-09 au
q 1.912843671919711 3.2776e-08 au
i 10.83553546845536 6.1577e-07 deg
node 91.53844908724133 3.6913e-06 deg
peri 5.743104411725255 4.275e-06 deg
M 121.436062164399 2.5853e-06 deg
tp 2458738.526022665966
(2019-Sep-12.02602267)
8.9336e-06 TDB
period 1369.532483811131
3.75
5.0148e-06
1.373e-08
d
yr
n .2628634254794696 9.6253e-10 deg/d
Q 2.914178231998463 7.1139e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3113  
   data-arc span      33242 days (91.01 yr)  
   first obs. used      1930-02-27  
   last obs. used      2021-03-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .33907  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:46:26  

Additional Information
 Earth MOID = .929733 au 
 Jupiter MOID = 2.27573 au 
 T_jup = 3.465 
[ 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 11.88   n/a E2021B10  
diameter diameter 10.746 km 0.179 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 155.4 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:
[McNeill, A.; Mommert, M.; Trilling, D.E.; Llama, J.; Skiff, B. (2019) Ap. J. Suppl. Series 245, id.29.]
[Polakis, T. (2020) Minor Planet Bull. 47, 177-186.]
geometric albedo albedo 0.278   0.049 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.848   0.023 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=19.24 deg.
U-B UB 0.481   0.035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=19.24 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

1665 Gaby (1930 DQ)          Discovered 1930-Feb-27 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1930 DQ = 1941 BC = 1949 HS = 1951 WQ = 1957 KF 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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