Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
925 Alphonsina (A920 AA)
Classification: Main-belt Asteroid          SPK-ID: 2000925
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 89 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08037071098752542 4.0797e-08  
a 2.699517707084316 7.2891e-09 au
q 2.482555549642535 1.0854e-07 au
i 21.10117237834636 4.239e-06 deg
node 299.5279159189938 1.151e-05 deg
peri 201.9983257316464 3.062e-05 deg
M 201.4508568189712 2.8918e-05 deg
tp 2459713.991980749809
(2022-May-14.49198075)
0.00013079 TDB
period 1620.047310988341
4.44
6.5616e-06
1.796e-08
d
yr
n .2222157325642392 9.0002e-10 deg/d
Q 2.916479864526096 7.8749e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3403  
   data-arc span      43000 days (117.73 yr)  
   first obs. used      1902-03-06  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38571  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 17:44:54  

Additional Information
 Earth MOID = 1.50472 au 
 Jupiter MOID = 2.18984 au 
 T_jup = 3.267 
[ 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 8.4   n/a MPO492760 IRAS observations used: 35
diameter diameter 57.505 km 0.443 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 7.880 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Hanslmeier, A. (1980) Mitt. Univ. Graz No. 70.]
[Harris, A.W.; Young, J.W. (1989) Icarus 81, 314-364.]
[Behrend, R. (2003) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.]
[Hamanowa, H.; Hamanowa, H. (2011) http://www2.ocn.ne.jp/~hamaten/astlcdata.htm]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Alton, K.B. (2017) Minor Planet Bull. 44, 188-189.]
geometric albedo albedo 0.248   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.850   0.015 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=7.22, mean=13.35, max.=19.81) deg.
U-B UB 0.454   0.028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=7.22, mean=13.31, max.=19.81) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

925 Alphonsina (A920 AA)          Discovered 1920-Jan-13 by Comas Sola, J. at Barcelona
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A920 AA = A902 ED 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Feb-22 11:05 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin