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30945 (1994 GW9)
Classification: Main-belt Asteroid          SPK-ID: 2030945
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .084408250145388 3.4717e-08  
a 3.064421029846788 1.6624e-08 au
q 2.805758613008693 1.1309e-07 au
i 10.15862619481307 4.785e-06 deg
node 33.31448550715688 1.9226e-05 deg
peri 280.9509215776416 3.3685e-05 deg
M 296.1531652419694 2.7674e-05 deg
tp 2459744.002512484408
(2022-Jun-13.50251248)
0.00015057 TDB
period 1959.390860463165
5.36
1.5944e-05
4.365e-08
d
yr
n .1837305701808278 1.4951e-09 deg/d
Q 3.323083446684884 1.8027e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1770  
   data-arc span      14396 days (39.41 yr)  
   first obs. used      1982-01-26  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49036  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 06:47:43  

Additional Information
 Earth MOID = 1.81524 au 
 Jupiter MOID = 1.9461 au 
 T_jup = 3.203 
[ 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 13.46   n/a MPO614063  
diameter diameter 7.944 km 0.288 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.38 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:
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]
geometric albedo albedo 0.147   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

30945 (1994 GW9)          Discovered 1994-Apr-14 by Gilmore, A. C., Kilmartin, P. M. at Lake Tekapo
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

[ 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
1905-Oct-24 14:36 00:03 Jupiter 1.92298986619369 1.92298946333753 1.92299026905007 3.86884345398994 3.75326609501292 2417143.108606573 2.62198657539623 70.20335637729 12.7187981882175 -76.7953981809449 2703440.99224871 T 30 CATAB v2.0g-lin.ifort 2021-Jul-08 06:47:57 2021-Jul-08 06:47
1964-Aug-14 18:10 00:01 Jupiter 1.93780944989372 1.9378090359563 1.93780986383125 4.26950239783557 4.16586660035632 2438622.257102904 1.18233492020242 53.4934524565488 15.4756598538003 -79.1201693749349 3194906.13541009 T 30 CATAB v2.0g-lin.ifort 2021-Jul-08 06:47:57 2021-Jul-08 06:47
2023-Jun-09 13:31 < 00:01 Jupiter 1.98530313341097 1.98530267784881 1.98530358897324 4.6218943929113 4.52864382594925 2460105.063385030 0.259344053405479 56.4315865463067 18.1905874589469 -79.0339541920062 3524843.94423366 T 30 CATAB v2.0g-lin.ifort 2021-Jul-08 06:47:57 2021-Jul-08 06:47
2072-Jul-06 02:23 00:01 Jupiter 1.96294752994127 1.96294709034136 1.96294796954141 3.32657446487373 3.19422710797526 2478029.599144698 1.46693724727641 60.8713031261104 9.74725659091765 -70.8822843763364 3105321.56848891 T 30 CATAB v2.0g-lin.ifort 2021-Jul-08 06:47:57 2021-Jul-08 06:47
2131-Apr-22 11:27 00:03 Jupiter 1.94419653048719 1.94419612036404 1.94419694061046 3.78634802066625 3.66948185516644 2499502.976800486 2.84485284441434 69.3512450129232 12.8688224349338 -76.012822962462 2425826.19287029 T 30 CATAB v2.0g-lin.ifort 2021-Jul-08 06:47:57 2021-Jul-08 06:47
2190-Feb-11 06:48 00:04 Jupiter 1.95263558341776 1.95263503921675 1.95263612761888 4.23673590306289 4.1330814974404 2520982.783644317 4.15634883415671 50.4007242095637 16.2830263416038 -74.8123199409316 1583917.48660768 T 30 CATAB v2.0g-lin.ifort 2021-Jul-08 06:47:57 2021-Jul-08 06:47

Alternate Designations
 1994 GW9 = 1982 BM5 = 1999 GV40 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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