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390 Alma (A894 FA)
Classification: Main-belt Asteroid          SPK-ID: 2000390
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .131718814466294 4.5296e-08  
a 2.65128967582661 6.5155e-09 au
q 2.302064942920004 1.2079e-07 au
i 12.16324325486605 4.993e-06 deg
node 305.2019585442804 2.0309e-05 deg
peri 190.3213350425412 2.6061e-05 deg
M 96.50436872115714 1.6005e-05 deg
tp 2458577.803481062365
(2019-Apr-04.30348106)
6.9734e-05 TDB
period 1576.827545053798
4.32
5.8125e-06
1.591e-08
d
yr
n .2283065140060815 8.4158e-10 deg/d
Q 3.000514408733216 7.3737e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2443  
   data-arc span      46156 days (126.37 yr)  
   first obs. used      1894-03-24  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40562  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:15:20  

Additional Information
 Earth MOID = 1.31738 au 
 Jupiter MOID = 2.06363 au 
 T_jup = 3.346 
[ 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 10.1   n/a MPO473766 IRAS observations used: 15
diameter diameter 25.688 km 0.180 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 3.74097 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Stephens, R.D. (2005) Minor Planet Bull. 32, 2-3.]
[Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Kaasalainen, M.; Warner, B.D.; Fauerbach, M.; et al. (2009) Astron. Astrophys. 493, 291-297.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
[Behrend, R. (2019) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.268   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.789   0.024 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=3.68 deg.
U-B UB 0.293   0.038 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=3.68 deg.
Tholen spectral type spec_T DT   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

390 Alma (A894 FA)          Discovered 1894-Mar-24 by Bigourdan, G. at Paris
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ 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
2049-Feb-06 08:28 < 00:01 Amphi 0.0193939364421703 0.0193923902237881 0.0193954829157261 4.09061134057971 4.09061126811628 2469478.852634730 0.675879600852711 145.479455557268 33.8174992922803 60.6955189269221 75408.2721280263 T 29 CATAB v2.0f-lin.ifort 2020-Aug-24 22:15:32 2020-Aug-24 22:15
2140-Apr-13 21:25 00:02 Iris 0.0419109865712083 0.0419089719461326 0.0419130025405082 5.46884543245277 5.4688454073715 2502782.392137250 1.54997699578362 414.226387449989 36.645399621998 76.8977965698055 166624.232404656 T 29 CATAB v2.0f-lin.ifort 2020-Aug-24 22:15:32 2020-Aug-24 22:15

Alternate Designations
 A894 FA = 1930 QW = 1950 BV = 1950 CH = 1953 YB = 1963 DF 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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