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2830 Greenwich (1980 GA)
Classification: Main-belt Asteroid          SPK-ID: 2002830
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2046712610885484 1.0603e-08  
a 2.378487470682015 7.6855e-09 au
q 1.891679440574215 2.8249e-08 au
i 25.35117423344635 4.7958e-07 deg
node 49.00729323410869 1.1534e-06 deg
peri 141.1949545691957 3.3045e-06 deg
M 44.23684092654908 5.2633e-06 deg
tp 2459035.861525506518
(2020-Jul-05.36152551)
1.9147e-05 TDB
period 1339.830095825906
3.67
6.494e-06
1.778e-08
d
yr
n .2686907848402127 1.3023e-09 deg/d
Q 2.865295500789815 9.2585e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2174  
   data-arc span      18707 days (51.22 yr)  
   first obs. used      1969-05-16  
   last obs. used      2020-08-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37017  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 14:20:36  

Additional Information
 Earth MOID = .924654 au 
 Jupiter MOID = 2.1887 au 
 T_jup = 3.384 
[ 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 12.52   n/a E2021B10  
diameter diameter 7.892 km 0.100 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 80.0681 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:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.172   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.867   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=8.27 deg.
U-B UB 0.441   0.028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=8.27 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 4 color indices

2830 Greenwich (1980 GA)          Discovered 1980-Apr-14 by Bowell, E. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1980 GA = 1969 KC = 1978 VZ14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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