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461 Saskia (A900 UG)
Classification: Main-belt Asteroid          SPK-ID: 2000461
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .144483238873048 2.1813e-08  
a 3.11854262300795 1.1652e-08 au
q 2.667965484272111 7.2211e-08 au
i 1.470937467624174 1.8426e-06 deg
node 156.5113276255321 3.4789e-05 deg
peri 308.1901087475974 3.3958e-05 deg
M 247.3193580045524 9.9831e-06 deg
tp 2459830.111664085630
(2022-Sep-07.61166409)
5.7542e-05 TDB
period 2011.527402195527
5.51
1.1273e-05
3.086e-08
d
yr
n .1789684791800847 1.003e-09 deg/d
Q 3.56911976174379 1.3335e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3217  
   data-arc span      43913 days (120.23 yr)  
   first obs. used      1900-10-22  
   last obs. used      2021-01-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .443  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 10:56:03  

Additional Information
 Earth MOID = 1.68498 au 
 Jupiter MOID = 1.57062 au 
 T_jup = 3.200 
[ 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 10.53   n/a E2021B10  
diameter diameter 43.603 km 0.256 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 7.348 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Buchheim, R.K. (2006) Minor Planet Bull. 33, 63.]
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Klinglesmith III, D.A.; Hanowell, J.; Risely, E.; Turk, J.; et al. (2013) Minor Planet Bull. 40, 190-193.]
[Klinglesmith III, D.A. (2017) Minor Planet Bull. 44, 127-129.]
[Klinglesmith III, D.A.; Lovata, E.A. (2018) Minor Planet Bull. 45, 397-398.]
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
geometric albedo albedo 0.057   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.610   0.028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=3.20, mean=3.53, max.=3.87) deg.
U-B UB 0.310   0.014 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=3.20, mean=3.53, max.=3.87) deg.
Tholen spectral type spec_T FCX   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

461 Saskia (A900 UG)          Discovered 1900-Oct-22 by Wolf, M. at Heidelberg
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
1927-Sep-11 22:41 00:01 Jupiter 1.84757234759843 1.84757155827397 1.84757313692351 3.00577525580925 2.84917210346554 2425135.444912262 1.48265811816351 70.7339719051059 5.71970737390537 70.9151606837848 7307206.08940096 T 41 CATAB v2.0f-lin.ifort 2021-Apr-12 10:57:00 2021-Apr-12 10:57
1937-Sep-30 11:43 00:01 Jupiter 1.59087975269183 1.59087956284474 1.59087994253911 1.50276731562178 1.09245671225833 2428806.988106903 1.31241744533982 62.3405074828859 45.3259657832878 63.1076494012453 4776093.203547 T 41 CATAB v2.0f-lin.ifort 2021-Apr-12 10:57:00 2021-Apr-12 10:57
1947-Oct-29 01:12 00:01 Jupiter 1.8964270978866 1.89642646793617 1.89642772783692 2.32074065712963 2.11956475703108 2432487.550015929 1.07467323942579 37.5566667504038 6.03731201699137 78.5802292326335 3128722.63226462 T 41 CATAB v2.0f-lin.ifort 2021-Apr-12 10:57:00 2021-Apr-12 10:57
1999-Jun-11 18:20 < 00:01 Jupiter 1.97529784964394 1.97529757699503 1.97529812229285 3.73344535379958 3.61676640545228 2451341.263848324 0.260342308961577 16.985793666788 8.98193162198487 62.9497280360794 6837236.46875994 T 41 CATAB v2.0f-lin.ifort 2021-Apr-12 10:57:00 2021-Apr-12 10:57
2009-Jul-07 09:38 < 00:01 Jupiter 1.59931451219983 1.59931434421281 1.59931468018676 1.66641691303004 1.31061565018508 2455019.901360846 0.104323087776412 31.9952207725144 11.832303612081 39.818360595785 6563061.93406285 T 41 CATAB v2.0f-lin.ifort 2021-Apr-12 10:57:00 2021-Apr-12 10:57
2019-Jul-30 22:39 < 00:01 Jupiter 1.76146265443963 1.76146248398312 1.76146282489614 1.89077515284668 1.6165717874509 2458695.443443015 0.150720209764659 23.3849548662352 9.65168044867317 88.4826390447145 5682217.63498078 T 41 CATAB v2.0f-lin.ifort 2021-Apr-12 10:57:00 2021-Apr-12 10:57
2081-Apr-15 14:25 00:01 Jupiter 1.66682305641426 1.66682266657162 1.666823446257 2.06279292791619 1.79966191725419 2481235.100845521 1.16918720479964 49.3480293847855 6.79338986972557 -75.2335769908056 4854405.05235065 T 41 CATAB v2.0f-lin.ifort 2021-Apr-12 10:57:00 2021-Apr-12 10:57
2091-May-04 18:08 00:01 Jupiter 1.65033040341963 1.65032997730093 1.65033082953804 1.59075465976448 1.22638166299549 2484906.255478259 1.35068090485263 43.4540953011028 23.9474613210767 44.5974212392533 4060008.49842574 T 41 CATAB v2.0f-lin.ifort 2021-Apr-12 10:57:00 2021-Apr-12 10:57
2153-Jan-24 13:48 00:02 Jupiter 1.77894365571314 1.77894262417866 1.77894468724913 2.66387068337862 2.47869546359764 2507451.074867062 2.36972295008666 104.685458753346 4.20029730067758 79.3043951929623 6883517.55804312 T 41 CATAB v2.0f-lin.ifort 2021-Apr-12 10:57:00 2021-Apr-12 10:57
2163-Feb-09 18:52 00:03 Jupiter 1.58500539957876 1.58500503546434 1.58500576369454 1.47119030757447 1.0467122053536 2511119.285807728 2.57119497500142 99.0751438335585 58.6523290368344 86.969399274625 4713589.71597478 T 41 CATAB v2.0f-lin.ifort 2021-Apr-12 10:57:00 2021-Apr-12 10:57
2173-Mar-10 12:54 00:03 Jupiter 1.96144234801823 1.96144094917046 1.96144374686622 2.5946397418066 2.42249505158187 2514801.037511018 2.66403878126118 85.2627227899232 10.2549763115366 63.4064170650064 3525790.54926783 T 41 CATAB v2.0f-lin.ifort 2021-Apr-12 10:57:00 2021-Apr-12 10:57

Alternate Designations
 A900 UG = 1935 CT = A917 XE = A924 DB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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