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2353 Alva (1975 UD)
Classification: Main-belt Asteroid          SPK-ID: 2002353
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 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1134157994322108 4.1792e-08  
a 2.803872230929967 1.176e-08 au
q 2.485868820353268 1.1894e-07 au
i 4.796266937126056 4.4739e-06 deg
node 24.63836753481592 4.4676e-05 deg
peri 301.2152048833041 4.7521e-05 deg
M 228.4984533947703 1.7775e-05 deg
tp 2459626.917837524610
(2022-Feb-16.41783752)
8.5847e-05 TDB
period 1714.887979118957
4.70
1.0789e-05
2.954e-08
d
yr
n .2099262484684008 1.3207e-09 deg/d
Q 3.121875641506665 1.3094e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2958  
   data-arc span      19625 days (53.73 yr)  
   first obs. used      1966-11-12  
   last obs. used      2020-08-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42879  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:49:50  

Additional Information
 Earth MOID = 1.47856 au 
 Jupiter MOID = 2.19788 au 
 T_jup = 3.309 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456926.5 (2014-Sep-26.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1110072868691244 4.1375e-08  
q 2.496863964475112 1.1724e-07 au
tp 2456188.644550946997
(2012-Sep-18.14455095)
8.3775e-05 TDB
node 24.78515094785458 4.4772e-05 deg
peri 300.1420982776365 4.7775e-05 deg
i 4.789164426427829 4.4636e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2958  
   data-arc span      19625 days (53.73 yr)  
   first obs. used      1966-11-12  
   last obs. used      2020-08-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42879  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:49:50  

Additional Information
 Jupiter MOID = 2.19788 au 
 T_jup = 3.309 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.711900698731019E-15 -4.831720831285381E-15 1.087014088674154E-12 3.702272286775798E-16 2.302448410731313E-13 6.882386228529843E-16
q -4.831720831285381E-15 1.374633584762896E-14 -2.954723023520136E-12 8.06911003852035E-16 -6.223108285591E-13 -2.417646051789395E-15
tp 1.087014088674154E-12 -2.954723023520136E-12 7.018174538068899E-9 3.571209717063067E-12 1.415013686250627E-9 4.980669781031452E-13
node 3.702272286775798E-16 8.06911003852035E-16 3.571209717063067E-12 2.004543431306071E-9 -1.996250093408006E-9 -7.528711576514969E-11
peri 2.302448410731313E-13 -6.223108285591E-13 1.415013686250627E-9 -1.996250093408006E-9 2.282450078866377E-9 7.506139165168046E-11
i 6.882386228529843E-16 -2.417646051789395E-15 4.980669781031452E-13 -7.528711576514969E-11 7.506139165168046E-11 1.992347810452762E-11

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 11.6   n/a MPO492778  
diameter diameter 12.564 km 0.192 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 62.6 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:
[Rowe, B. (2018) Minor Planet Bull. 45, 203-207.]
geometric albedo albedo 0.213   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
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)

2353 Alva (1975 UD)          Discovered 1975-Oct-27 by Wild, P. at Zimmerwald
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1975 UD = 1926 GA = 1966 VG = 1970 SG1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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