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2608 Seneca (1978 DA)
Classification: Amor [NEO]          SPK-ID: 2002608
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5710419600488569 2.4042e-07  
a 2.516518960332776 1.0954e-07 AU
q 1.079481040724236 5.8672e-07 AU
i 14.67983654254569 5.2819e-05 deg
node 167.3687942793554 4.1601e-05 deg
peri 37.31744635733607 0.00012415 deg
M 106.1898086298681 0.00024693 deg
tp 2456570.390460928053
(2013-Oct-04.89046093)
0.00097903 JED
period 1458.138366230648
3.99
9.5203e-05
2.607e-07
d
yr
n .2468901500278166 1.612e-08 deg/d
Q 3.953556879941316 1.7209e-07 AU
  Orbit Determination Parameters
   # obs. used (total)      57  
   data-arc span      11871 days (32.50 yr)  
   first obs. used      1978-02-17  
   last obs. used      2010-08-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      1  
   fit RMS      .71515  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 17:43:00  

Additional Information
 Earth MOID = .133109 AU 
 T_jup = 3.172 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.52 mag n/a PDS3 (MPC 17266)  
diameter diameter 0.9 km n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543  
rotation period rot_per 8. h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Degewij, J. (1978) Messenger 13, 5; IAUC 3193.]
geometric albedo albedo 0.21   n/a Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543  
B-V BV .826 mag .020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=4; phase (min.=22.10, mean=23.28, max.=26.12) deg.
U-B UB .454 mag .052 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=4; phase (min.=22.22, mean=23.41, max.=26.12) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

2608 Seneca (1978 DA)          Discovered 1978-Feb-17 by Schuster, H.-E. at La Silla (809)
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
1905-Mar-01 00:30 < 00:01 Earth 0.172288144710024 0.172261147559094 0.172315141498886 17.1351760679411 17.1342735001543 2416905.521069113 0.802634050227673 1206.85313327463 38.7976690815069 -2.54039009830182 30350.3305382699 T 14 CATAB v2.0c-linF95 2014-Jun-09 17:43:02 2014-Jun-09 17:43
1928-Feb-14 14:00 < 00:01 Earth 0.418386479739037 0.418351588837229 0.418421370548836 23.6535384401785 23.6532691992568 2425291.083134475 0.632371834530857 1705.5935748845 32.2031420553825 3.83712423732932 122044.998362613 T 14 CATAB v2.0c-linF95 2014-Jun-09 17:43:02 2014-Jun-09 17:43
1947-Jun-05 00:50 < 00:01 Earth 0.419758808059678 0.419731601255299 0.419786016339556 18.5710211702822 18.5706793634413 2432341.535041052 0.842761317172533 1724.6736975578 105.002517511746 -35.9846356194253 302305.604786173 T 14 CATAB v2.0c-linF95 2014-Jun-09 17:43:02 2014-Jun-09 17:43
1951-Feb-11 20:15 < 00:01 Earth 0.487146491343849 0.487112383482083 0.487180599163748 25.2271668827167 25.2269500692947 2433689.343727711 0.550359390120976 1683.73661687089 30.5206861137806 3.63572289430293 143828.439751209 T 14 CATAB v2.0c-linF95 2014-Jun-09 17:43:02 2014-Jun-09 17:43
1974-Jun-05 09:30 < 00:01 Earth 0.475773453375435 0.475765991663825 0.475780915149304 19.6573314972032 19.657046598327 2442203.895933881 0.113191324267203 445.935993867904 114.687086227729 -32.3114720112236 311478.861093149 T 14 CATAB v2.0c-linF95 2014-Jun-09 17:43:02 2014-Jun-09 17:43
1975-Dec-15 17:43 < 00:01 Jupiter 1.57484419647821 1.57482905823151 1.57485933468637 7.22544867289123 7.15062360687012 2442762.238049648 0.548054707179111 166.609249582953 30.0940651175724 26.233721981839 442483.797754893 T 14 CATAB v2.0c-linF95 2014-Jun-09 17:43:02 2014-Jun-09 17:43
1978-Mar-15 10:10 < 00:01 Earth 0.0900397845715875 0.0900384078179207 0.0900411613238863 13.1504649969389 13.1482145231327 2443582.923864757 0.0780099030164856 54.8867010587456 22.7013950522171 6.0102338169026 192025.054480876 T 14 CATAB v2.0c-linF95 2014-Jun-09 17:43:02 2014-Jun-09 17:43
1987-Sep-27 05:26 < 00:01 Jupiter 1.33171748560769 1.33170995407811 1.33172501717175 6.19076395327845 6.08715721346273 2447065.726052979 0.949385730183689 76.8777310848812 32.9881989701234 43.4268723109891 470162.17013041 T 14 CATAB v2.0c-linF95 2014-Jun-09 17:43:02 2014-Jun-09 17:43
1999-Jul-29 18:25 00:02 Jupiter 1.2557176997978 1.2557139817495 1.25572141783568 5.80479907502046 5.68740952594892 2451389.267015128 1.49936744150733 43.4920583483822 36.8649362416213 71.027112839592 485927.563420564 T 14 CATAB v2.0c-linF95 2014-Jun-09 17:43:02 2014-Jun-09 17:43
2011-Jun-19 18:13 00:02 Jupiter 1.29166714283678 1.29166351575346 1.29167076992185 5.88827843273212 5.77583800419563 2455732.259012741 1.84243822033764 52.0658387538346 39.4349192358018 10.4147997786145 368863.250707918 T 14 CATAB v2.0c-linF95 2014-Jun-09 17:43:02 2014-Jun-09 17:43
2023-Jun-02 06:03 00:02 Jupiter 1.46808074460282 1.46807385608381 1.46808763315278 6.49735581540758 6.40794151283856 2460097.752398328 1.93925375199939 106.815247939455 41.5287686048172 15.6130105084521 263838.370561916 T 14 CATAB v2.0c-linF95 2014-Jun-09 17:43:02 2014-Jun-09 17:43
2035-Jun-09 02:11 00:02 Jupiter 1.8610797444167 1.86106716448793 1.86109232434498 7.8669390820951 7.80887200746566 2464487.591015676 1.7451525141693 221.372724375694 45.3377526290242 11.8677443058714 230206.826051028 T 14 CATAB v2.0c-linF95 2014-Jun-09 17:43:02 2014-Jun-09 17:43
2062-Mar-22 11:05 00:02 Earth 0.25489821001233 0.254837242189994 0.254959189534944 12.1579618552734 12.1571020499071 2474270.961524604 1.70373736433785 3478.21964844337 43.3975695249977 -39.4587774118643 411578.161715146 T 14 CATAB v2.0c-linF95 2014-Jun-09 17:43:02 2014-Jun-09 17:43
2066-Apr-13 04:34 < 00:01 Earth 0.444019398193962 0.443935853100822 0.4441029398468 10.2219880591092 10.221400992317 2475753.690340744 0.968641960133333 3578.19572876528 50.1571389313773 2.59441544563533 42296.4024722642 T 14 CATAB v2.0c-linF95 2014-Jun-09 17:43:02 2014-Jun-09 17:43
2111-Mar-20 22:13 00:01 Earth 0.276574060673455 0.276517997416343 0.276630128332458 13.2385558461199 13.2378281128405 2492165.425797871 1.3565461324981 2948.18593846138 46.0740823058096 -32.0890246686044 364956.487169438 T 14 CATAB v2.0c-linF95 2014-Jun-09 17:43:02 2014-Jun-09 17:43
2115-Apr-10 08:16 00:02 Earth 0.334948290877069 0.334890418384409 0.335006161708914 8.88777710079006 8.88688201779641 2493646.844348984 1.53160750961781 2139.04810344072 45.529544019319 12.3272251976806 147067.346127759 T 14 CATAB v2.0c-linF95 2014-Jun-09 17:43:02 2014-Jun-09 17:43
2129-Aug-31 00:29 00:01 Jupiter 1.90959473036442 1.90958717904867 1.90960228167633 6.75184019075289 6.68582254905941 2498903.520405789 1.30223055246784 112.847655191291 21.6945725130981 -15.6119487252038 482703.303529169 T 14 CATAB v2.0c-linF95 2014-Jun-09 17:43:02 2014-Jun-09 17:43
2141-Aug-20 01:00 00:02 Jupiter 1.5146816413244 1.51467467865918 1.51468860397587 5.40626255225452 5.30181650223389 2503275.541774231 1.6610660873465 64.3427826551681 15.6975788297109 -23.1418271159399 587658.77995159 T 14 CATAB v2.0c-linF95 2014-Jun-09 17:43:02 2014-Jun-09 17:43
2153-Jul-27 01:33 00:02 Jupiter 1.34998758307302 1.34997882125417 1.34999634485315 4.94293365318942 4.81432584962947 2507634.564530131 1.83152589748717 67.0557546842246 16.7405311969294 -18.7844581402651 395832.254776289 T 14 CATAB v2.0c-linF95 2014-Jun-09 17:43:02 2014-Jun-09 17:43
2165-Jun-20 13:43 00:02 Jupiter 1.33454455467501 1.33453176469527 1.33455734455413 4.92792838347884 4.79740528876615 2511981.071732060 1.75657946591488 99.3885641524684 18.513217252787 -13.0413846565423 254957.842399495 T 14 CATAB v2.0c-linF95 2014-Jun-09 17:43:02 2014-Jun-09 17:43
2175-May-24 02:51 00:03 Earth 0.306453284684319 0.30639543051165 0.306511149625717 12.9870258476997 12.9863563492655 2515605.618589379 3.46985048878574 3608.66134452476 92.5238956594192 -36.0916212012491 221590.223039564 T 14 CATAB v2.0c-linF95 2014-Jun-09 17:43:02 2014-Jun-09 17:43
2177-May-02 02:06 00:02 Jupiter 1.42263071316568 1.4226088649557 1.42265256103603 5.26274808679478 5.14837197852333 2516314.587608805 1.55068452334844 199.449689045762 24.6275376932349 -3.32833193369538 102591.804248408 T 14 CATAB v2.0c-linF95 2014-Jun-09 17:43:02 2014-Jun-09 17:43
2179-Mar-14 11:21 00:04 Earth 0.0984160728801111 0.0983688821907877 0.0984633281596174 13.2547842107043 13.2527414987531 2516995.972581103 3.84410240912151 3716.40980317673 29.7467824826955 -57.0870802973964 317856.882147767 T 14 CATAB v2.0c-linF95 2014-Jun-09 17:43:02 2014-Jun-09 17:43
2189-Feb-26 15:05 00:01 Jupiter 1.67607031903489 1.67602744729277 1.67611318981323 6.28817294489988 6.20728561176952 2520633.128791331 1.33210874994305 511.358858827644 34.5687993703849 4.10594575400094 73546.0430937827 T 14 CATAB v2.0c-linF95 2014-Jun-09 17:43:02 2014-Jun-09 17:43
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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