Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
4183 Cuno (1959 LM)
Classification: Apollo [NEO, PHA]          SPK-ID: 2004183
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 253 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6344144283217399 2.6925e-08  
a 1.982206163222327 4.7344e-09 AU
q .724665973365805 5.2796e-08 AU
i 6.707521754593968 4.2965e-06 deg
node 294.9334772263796 3.9758e-05 deg
peri 236.2735176442014 4.0012e-05 deg
M 345.2200111065804 8.0454e-06 deg
tp 2457042.349788453756
(2015-Jan-19.84978845)
2.2912e-05 JED
period 1019.34608692838
2.79
3.652e-06
9.999e-09
d
yr
n .3531675891205865 1.2653e-09 deg/d
Q 3.239746353078849 7.738e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1431  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      20224 days (55.37 yr)  
   first obs. used      1959-06-05  
   last obs. used      2014-10-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49907  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-19 06:15:55  

Additional Information
 Earth MOID = .0287606 AU 
 T_jup = 3.573 
[ 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 14.4 mag n/a PDS3 (MPC 28111)  
rotation period rot_per 3.5595 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (1997) http://www.asu.cas.cz/~ppravec/neo.htm]
[Pravec, P.; Wolf, M.; Sarounova, L. (1998) http://www.asu.cas.cz/~ppravec/neo.htm]
[Pravec, P.; Wolf, M.; Sarounova, L. (2000) http://www.asu.cas.cz/~ppravec/neo.htm]
SMASSII spectral type spec_B Sq   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)

4183 Cuno (1959 LM)          Discovered 1959-Jun-05 by Hoffmeister, C. at Bloemfontein (074)
Reference: DISCOVERY.DBLast Updated: 2013-09-05

[ 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
1903-Sep-16 07:47 < 00:01 Mars 0.0796253041133453 0.0796249879857746 0.0796256202411731 17.9568263560986 17.956626126664 2416373.824304182 0.00995448638172295 19.8409385421347 12.9394338008635 -58.6901083387321 814825.360212026 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
1906-May-08 07:25 < 00:01 Earth 0.190707238494052 0.190706960639973 0.190707516348579 12.5459670718427 12.5448533921207 2417338.808879267 0.0226060319785469 10.4815497983655 7.51333064753434 -46.2146547143494 2486048.61974549 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
1920-Mar-15 20:32 < 00:01 Earth 0.282188737903795 0.282188583515893 0.282188892291494 14.9370560904282 14.9364239452092 2422399.355215450 0.154018149849415 10.9642160661854 7.86981193502394 88.6626303953425 4298248.33280616 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
1927-Feb-21 17:43 < 00:01 Jupiter 1.9139552389726 1.91395484791637 1.91395563003515 3.88863188812778 3.7731096278159 2424933.238502053 0.296409481550864 5.02584459780351 2.13095029347768 19.23775222663 4523495.98593192 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
1934-Feb-01 03:54 < 00:01 Earth 0.21169371440482 0.21169261661849 0.211694812198522 13.3033925086575 13.302446364237 2427469.662699620 0.203471992376988 33.612785145738 8.05989641197283 30.3015492320147 1642054.73584657 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
1934-Feb-18 00:41 < 00:01 Venus 0.103664170307121 0.103663278825327 0.103665061796373 10.2812955237315 10.2792578461563 2427486.528210221 0.189587773048806 34.2065289145329 5.65552524652927 -41.3073151098474 1299050.75347568 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
1945-Jun-08 21:36 < 00:01 Earth 0.212203879414952 0.212201294083742 0.212206464751457 22.5789791083946 22.5784229991892 2431615.400265347 0.0647717027665617 133.984426335084 9.65627966572862 24.3357529284601 1229533.60281207 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
1947-Dec-22 14:28 < 00:01 Earth 0.147374727321828 0.147371941774407 0.147377512870527 21.3462728383281 21.3454258529709 2432542.102537198 0.0764350058398908 133.638936582142 10.0285770129816 -15.5000556288932 538937.565687222 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
1959-May-09 15:54 < 00:01 Earth 0.188127580794885 0.188125654007318 0.188129507608658 12.5459819288515 12.5448529786933 2436698.162356456 0.194105402230884 67.5478402014617 7.4495229933872 -39.3616437032979 1806749.31897959 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
1963-Jun-26 10:19 < 00:01 Jupiter 1.99026687057273 1.99026620729829 1.99026753384626 4.221901826469 4.11986532160047 2438206.930133447 0.506868838120907 9.55731965738557 2.75337923437406 -9.2344463136972 2487049.31978393 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
1973-Mar-24 04:37 < 00:01 Earth 0.27998865460156 0.279988437361199 0.279988871842019 14.6695040367229 14.6688553035664 2441765.692365724 0.260772134711095 16.7727988129522 7.47828575764465 -78.0343964680769 4381880.06171291 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
1974-Jul-24 09:23 < 00:01 Jupiter 1.93884705455625 1.93884666363494 1.93884744547819 3.91181610928914 3.79849534950051 2442252.891130007 0.288713283488415 6.00386233977931 2.23750915240458 14.0246682885515 3684673.74937457 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
1976-Jan-14 09:51 < 00:01 Venus 0.130795687331211 0.130795123686611 0.130796250993678 11.9599920611165 11.9586038042318 2442791.910224747 0.115051214344716 65.6223205818587 6.58677001423169 60.6572561657583 1962954.78677905 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
1987-Feb-03 14:56 < 00:01 Earth 0.220609291215829 0.22060872119823 0.220609861236568 13.3970789392954 13.3961773825767 2446830.122376935 0.123898419730409 17.2277991454488 8.11327818907846 34.0764015051083 2134452.36085052 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
1998-Jun-09 16:24 < 00:01 Earth 0.207934968818858 0.207934293508222 0.207935644129679 22.5362409141256 22.5356723115439 2450974.183572304 0.0116416623478764 33.64729782938 9.61736428030856 21.539691759666 1313750.71734101 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2000-Dec-22 19:04 < 00:01 Earth 0.142653382565475 0.142653257321987 0.142653507808967 21.1985443915961 21.1976632752308 2451901.294114564 0.0134850279635631 10.766859171296 5.84924497716685 -82.6585400451215 3209809.13907263 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2010-Nov-29 05:52 < 00:01 Jupiter 1.95641838307539 1.95641806553878 1.95641870061248 4.15955464827686 4.05413417287728 2455529.744431382 0.174632269355954 3.20842102568496 2.72423629020058 4.19009004957844 6351705.43641192 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2012-Mar-18 14:21 < 00:01 Venus 0.145707115631402 0.145706241436065 0.145707989828863 17.5547115318382 17.5538625371185 2456005.097802099 0.0312595818728457 48.9529262897919 8.52242049981675 33.7091602894161 1264029.38175708 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2012-May-20 19:13 < 00:01 Earth 0.121825358987543 0.121824716582359 0.121826001396611 14.3964430608806 14.3949237649668 2456068.300550978 0.043337590964232 32.7819338305472 8.21037548344286 -49.171853467578 1358278.24962102 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2014-Dec-08 18:07 < 00:01 Earth 0.427696217828718 0.427695149946327 0.427697285711063 29.7156311771717 29.715421527822 2457000.254554740 0.0228798552358644 52.6651611356835 10.7237694672292 -4.36577274793523 1211108.6448606 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2021-Dec-26 13:03 < 00:01 Jupiter 1.96521645034334 1.96521618358478 1.96521671710772 3.94967679125744 3.83900146885842 2459575.043777015 0.275580876523774 4.21921974094964 2.34743774080527 12.1705757985137 4823790.66278275 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2026-Apr-04 15:19 < 00:01 Earth 0.274928096034728 0.274927797363668 0.274928394703833 14.2145465446182 14.2138647232022 2461135.138461716 0.229605801741733 13.6455241753883 7.76716681178981 -66.6574229259345 3939264.66116237 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2040-Jan-31 10:24 < 00:01 Earth 0.208219544813867 0.208218036390081 0.208221053251188 13.17311547266 13.1721440272984 2466184.933296208 0.244484481382965 45.6298851029915 8.24920681353373 26.6995424203262 1375789.89941051 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2051-Jun-09 12:47 < 00:01 Earth 0.195330432511431 0.19532831874096 0.19533254628624 22.1170857504895 22.1164689842422 2470332.032920282 0.0627437375289573 110.128218576962 9.52394695453228 25.4825155627965 1197472.46207691 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2053-Dec-22 18:43 < 00:01 Earth 0.153663378312409 0.153660870948344 0.153665885675564 21.5697203086208 21.5689164020855 2471259.279908978 0.0652466377080272 117.824482298342 10.4034101294044 -10.2191277727927 387274.62814415 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2054-Jan-17 09:50 < 00:01 Venus 0.135679390502344 0.135677133013894 0.135681648010968 17.2458540552932 17.244925982501 2471284.909509964 0.0791896043848138 130.331275822245 8.54387661656655 35.835078821708 1197757.24780192 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2058-Apr-29 00:22 < 00:01 Jupiter 1.92042356950899 1.92042325164562 1.9204238873714 4.04311551562352 3.93251351629864 2472847.515519646 0.418038655583063 5.80932398759703 2.61871678972778 -2.44955388271664 3355269.3243011 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2065-May-20 11:20 < 00:01 Earth 0.1279818963479 0.127981035559199 0.127982757142078 14.0821188893973 14.0806403986593 2475425.972435108 0.0602823111111665 39.0919759408331 7.95919296142006 -42.9963537074602 1316004.84748781 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2067-Dec-09 03:49 < 00:01 Earth 0.437309585064335 0.437308584479367 0.437310585649259 30.0024404919371 30.0022374114263 2476358.659352496 0.0184327776155614 49.2217147855471 10.8679631789267 -3.56575865645173 1291905.3970945 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2079-Mar-24 02:36 < 00:01 Earth 0.285630361996013 0.285630194586736 0.285630529405315 14.8719992195449 14.8713719592595 2480481.608515269 0.0602754175714456 8.38750921244397 7.15360362748149 -29.4230793568227 4256617.56641413 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2090-Jun-23 06:52 < 00:01 Earth 0.437330263517262 0.437328534516882 0.437331992517649 29.5919760548335 29.5917701671493 2484590.786112195 0.0304736300545746 86.014487426173 9.77010365032723 8.77989853172196 1186850.60204091 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2093-Jan-08 03:06 < 00:01 Earth 0.0842828702521643 0.0842810332701505 0.0842847072446761 14.8688686238361 14.8667423158541 2485520.629364573 0.0946698865230783 71.9021634107195 9.28260546375753 18.2098142119886 364270.139559119 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2101-Jul-12 04:37 < 00:01 Venus 0.122973718537261 0.122973372846176 0.122974064245356 10.8084743357368 10.8068404372472 2488626.692214087 0.175779123523588 56.2886693296845 6.24721897538016 65.1284194719905 1934147.12542706 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2104-Jun-03 03:28 < 00:01 Earth 0.0981136229676895 0.0981123887875888 0.0981148571775075 18.5706144986131 18.5691520727138 2489683.644116325 0.0599509899586688 94.2533805951706 9.14884495186226 53.7103292758189 1111001.35831253 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2105-Sep-23 01:02 < 00:01 Jupiter 1.88144384555493 1.8814434301446 1.88144426096861 3.95686974333651 3.84140884181266 2490160.543002442 0.494573281678748 5.88526976915161 2.5819512744153 -10.6581167096284 3381035.44237662 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2106-Dec-20 16:48 < 00:01 Earth 0.233942761996119 0.233940624743219 0.233944899248286 23.9207465976415 23.9202704601982 2490614.199861537 0.0506871498515208 102.367690281163 10.7662610135516 -6.42610619393646 450787.565701474 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2118-May-21 22:23 < 00:01 Earth 0.132757571855532 0.132755557975559 0.132759585763895 13.9026083496074 13.9011646417574 2494784.432517870 0.12529415933874 88.1371351733125 7.99643973026328 -40.1443114792837 1255912.78145789 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2120-Dec-08 13:12 < 00:01 Earth 0.454564229210542 0.454561811275816 0.454566647145168 30.7007022728472 30.70051134462 2495716.050109825 0.047241923114433 119.962551682714 11.1108003398354 -4.09920530054546 671659.811544581 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2132-Mar-15 03:20 < 00:01 Earth 0.288405288170771 0.288405140774866 0.288405435566552 15.1160598705487 15.1154486762222 2499830.639065306 0.369745032770622 18.305756789812 6.92608258510831 84.2895168273642 4992018.73129221 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2137-Sep-23 08:15 < 00:01 Venus 0.0982373575661305 0.0982363769782439 0.0982383382128049 14.1161044683655 14.1145384332336 2501848.843983517 0.116942042059072 109.858443289458 7.94856389184572 63.6278814564155 1337477.59280049 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2143-May-23 11:57 < 00:01 Venus 0.140932173709975 0.140930692596293 0.140933654871267 14.1690866310623 14.1679991201926 2503916.998247858 0.120650428244147 128.388109027624 6.70557783285822 53.9724510650699 2056135.11175854 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2143-Jun-22 12:12 < 00:01 Earth 0.392982709759743 0.392979982605232 0.392985436914382 28.2270631077519 28.2268229066102 2503947.008158309 0.0515690273725366 135.560715997628 9.83130972716934 10.3339270188416 1073174.18892078 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2146-Jan-08 00:12 < 00:01 Earth 0.0611024502985452 0.0611000087971062 0.0611048918221364 15.4175531773723 15.4147245345169 2504877.508100577 0.118172127027695 100.113713231893 9.6412044343045 19.9506141423936 270645.478331866 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2153-Feb-24 15:21 < 00:01 Jupiter 1.8604192494934 1.86041881237783 1.8604196866062 3.92712990294277 3.80943271648257 2507482.139552301 0.363743278720799 3.01863687678794 2.57605863821523 -15.5166453682541 6134225.60505901 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2157-Jun-11 03:17 < 00:01 Earth 0.194002964589114 0.194002039301956 0.194003889876977 22.1417741125085 22.1411538183979 2509049.636699202 0.0201622131812491 47.2888693461275 9.27891468011121 24.6502086434553 1266719.82368407 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2159-Dec-27 12:33 < 00:01 Earth 0.121795571445958 0.121795084002438 0.121796058889475 20.6068704262221 20.605808779541 2509979.023097015 0.0196798834301738 22.9184766721913 6.72054746106726 14.4039062534766 899758.267688925 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2171-May-28 06:12 < 00:01 Earth 0.0916135454712225 0.0916122086510965 0.0916148823275744 15.4448912239961 15.4430080333451 2514148.758076004 0.0917518801569518 84.523593427493 8.44937682994105 -55.1301926559813 1081173.45397869 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2173-Dec-12 13:32 < 00:01 Earth 0.390521792645391 0.390518820224441 0.390524765065783 28.7575451465578 28.7573078906345 2515078.063650275 0.0578924463595472 145.831193064029 11.1854055168459 -3.0396257611185 453365.107347809 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2174-Jan-05 23:36 < 00:01 Venus 0.131840964707336 0.131838492458815 0.131843436993293 16.7113621863964 16.7103765436521 2515102.483335976 0.0984097008712147 152.962861058266 8.63495929506864 40.5537758590925 1265661.73298679 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2179-Sep-01 20:57 < 00:01 Venus 0.12180499463128 0.121804473884636 0.121805515471092 11.3941367823946 11.3925720061577 2517167.372581379 0.304324999231744 123.32080812324 6.1004795770104 69.0413528967418 2067028.28495418 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2185-Mar-20 06:40 < 00:01 Earth 0.289320041714753 0.289319912622109 0.289320170808012 15.0806922456435 15.0800815548767 2519193.777620239 0.730549067231497 29.8596306002389 7.4945988126492 73.6296394494238 4467696.31218012 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2196-Jun-27 19:32 < 00:01 Earth 0.498662913954513 0.498656255739466 0.498669572170372 31.414138811923 31.4139687209351 2523311.313689948 0.130371442458826 333.101954026513 9.81539368310616 7.50587188683273 958153.367461252 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2199-Jan-23 11:54 < 00:01 Earth 0.165868888000738 0.165862520742464 0.165875255431861 12.9205897792339 12.9193464504678 2524250.995892886 0.618212551095443 196.027717422024 8.78149048948615 12.6439847571394 476940.666683838 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16
2200-Aug-03 07:53 00:02 Jupiter 1.84467918715151 1.844678532978 1.84467984133163 3.89703617980315 3.7773733882748 2524807.828729986 1.70691139026817 15.396610596207 2.49512079488904 -6.37049398997364 1398466.16397766 T 253 CATAB v2.0c-linF95 2014-Oct-19 06:16:07 2014-Oct-19 06:16

Alternate Designations
 1959 LM = 1986 VT7 = 1987 MB 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Oct-23 01:38 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin