My Occultation Observation Table

My Occultation Observation Table 2017-09-26T18:37:08+00:00


I have successfully observed and timed the following asteroid/planetary satellite occultations.  Accurate ground track forecasting prior to 2001 was really poor, making successful observations problematic at best. You had to be really lucky in order to see an occultation. Beginning in 2001 many more events were being forecasted with improved accuracy, and astrometry (the science of astronomical position measurement) sources and reduction techniques experienced a major advancement.  Then in the fall of 2016 the GAIA star catalog was introduced which caused most star position errors to be reduced to near zero, leaving 100% of the prediction error contribution to the individual asteroid ephemeris.

Abbreviations: C8=Celestron 8-inch Schmidt Cass telescope in the table below. The M4 is the Meade 2045D telecope.  Under “Method” a number in parentheses indicates the number of separate stations that I deployed that succeeded.

My method of observation changed in 2001 when I purchased a red sensitive 3rd generation image intensifier from Collins Electro Optics.   This remarkable device is vastly superior to either visual or video observation alone. But for general occultation observation of stars down to +10, for example, intensification is really not needed. I used this device for a long time because it improved the chances for faint star detection in the event that the target is between +11 and +12. In a star field crowded with dim stars, or in a case where the target is a close double, the intensifier makes a vast difference. Recall that visual observation has built in human reaction time as well as the inability to play the observation back to check its accuracy and show it to others.

Where it states “intensified video” that means the image intensifier was used. Where it states “video” it means that for a Celestron 8 there was an f/3.3 or f/6.3 corrector lens used or for the 50mm or 80mm there was an f/0.5 focal reducer employed. Image intensification has not been used since 2010 since there is a lot of noise generated which causes precise data reduction to be complicated.

For each success listed in the table, there were at least 7 to 10 failures that are not listed in the years prior to 2001. Following that the failure rate decreased to 1 in 2. The encouraging thought here is that if you make an attempt and do not succeed the first time, continue to observe future events. You will increase your proficiency in recognizing the problems associated with finding the target star, tracking, observing for a continuous period of time, battling weather elements, battery failures and more. Paying close attention to the predictions will let you become familiar with the error margins and will also lead to more successes. This is a fun and fantastic experience.

Occultations like this pose challenging locations. But rarely it is possible to observe and record such an event even from inside a closed hotel room.

A successful occultation of 9.5 magnitude TYC 0651-00137-1 from inside room 3284 Marriott Auditorium Circle hotel, Madrid, Spain on September 19, 2017 using an 80mm refractor.  Even at a 63 degree angle, it was possible to see and even record the star through the window glass but to enhance clarity and hang the GPS antenna outside, the window was opened. 


20510/21/172UCAC 40684617(751) FAINAC8 VIDEOGREEN VALLEY, AZ
20410/21/17TYC 2450-01220-1(772) Tanete80mm VIDEOGILA BEND, AZ
2039/25/172UCAC 44809976(141) LumenC8 VIDEOTUCSON, AZ
2029/19/17TYC 0651-00137-1(44) Nysa80mm VIDEOMADRID, SPAIN (CONTINENT#5)
2019/10/17TYC 5010-00469-1(357) NininaM8 VIDEO FERNLEY, NV
2008/31/17TYC 5777-0095-1(38) LedaC8 VIDEORIO RICO, AZ
1998/23/17TYC 5780-00308-1(834) Burnhamia80mm VIDEOHIAWATHA, KS
1986/21/172UCAC 21176212(347) ParianaC8 VIDEOFORT MCDOWELL, AZ
1976/14/17TYC 6843-02468-1(346) HermentariaC11 VIDEOCHLORIDE, AZ
1966/13/172UCAC 21356976(481) EmitaC11 VIDEOBAGDAD, AZ
1955/23/172UCAC 38589324(510) MabellaC11 VIDEOWHITE RIVER, AZ
1944/25/17TYC 0863-00143-1(70) PanopaeaC8 VIDEOMARANA, AZ
1934/14/174U 583-37262(96) AegleC11 VIDEOAJO, AZ
1924/11/17HIP 62736(105) Artemis80mm VIDEOMORRISTOWN, AZ
1914/1/174U 398-73208(238) HypatiaC8 VIDEOAMADO, AZ
1903/30/174UC 581-028529(467) LauraC11 VIDEOBUCKEYE, AZ
1893/27172UCAC 38082665(581) TauntoniaC8 VIDEOCAREFREE, AZ
1883/14/17TYC 1878-01081-1(113) Amalthea80mm VIDEOBUCKEYE, AZ
1873/8/17TYC 2469-00702-1(235) Carolina80mm VIDEOCAMP VERDE, AZ
1863/5/172UCAC 30841788(225) HenriettaC8 VIDEOMARANA, AZ
1853/2/17TYC 4959-01096-1(1186) TurneraC8 VIDEOBUCKEYE, AZ
1842/1/174U 594-40853(121) HermioneC8 VIDEOMAYER, AZ
1831/31/17TYC 1354-00834-1(206) Hersilia50mm VIDEOVINLAND, KS
1821/26/174U 660-36134(693) ZerbinettaC8 VIDEOLEWIS APRINGS, AZ
1811/16/174U 606-18255(165) LoreleyC8 VIDEOWILLOW BEACH AZ
18012/25/16TYC 2430-01124-1(22) Kalliope80mm VIDEO (8)PUNE, INDIA
17912/10/162UCAC 46811831(693) ZerbinettaC8 VIDEOYUMA AZ
17812/8/16TYC 3346-00054-1(193) AmbrosiaC8 VIDEONOTHING AZ
17711/24/16TYC 1294-02161-1(803) PickaC8 VIDEOCAMP VERDE AZ
17611/22/164UC 598-009170(932) HooveriaC8 VIDEOBUCKEYE AZ
17511/20/16TYC 0607-01215-1(976) Benjamina80mm VIDEOBRAMAN OK
17411/3/16TYC 0762-02213-1(323) BruciaC8 VIDEOLOVE, AZ
17310/18/16TYC 1307-01531-1(72) FeroniaC8 VIDEOBUCKEYE, AZ
17210/16/162UCAC 33861632(108) HecubaC8 VIDEOELOY, AZ
17110/5/16TYC 6978-00853-1(451) Patientia80mm VIDEO (2)
70mm VIDEO (1)
17010/2/16TYC 1245-01023-1(849) Ara80mm VIDEODOLAN SPRINGS, AZ
1697/21/162UCAC 28448068(10) Camilla24-inch VIDEOCLIFTON, TX
1687/7/162UCAC 36922360(2) PallasC11 VIDEO CAREFREE,AZ
1673/18/16TYC 1241-00454-1(257) Silesia80mm VIDEOMCGUIREVILLE, AZ
1662/17/162UCAC 35162896(635) VundtiaC11 VIDEOCAREFREE, AZ
1652/14/16TYC 2485-00465-1(952) CaiaC8 VIDEOCAREFREE, AZ
1642/6/162UCAC 33881772(181) EucharisC11 VIDEOCAREFREE, AZ
16312/30/152UCAC 39956822(96) AegleC8 VIDEOCAREFREE, AZ
16211/11/15TYC 1198-00160-1(29) Amphitrite80mm VIDEOBENSON, AZ
16110/30/15HIP100985(415) Palatia70mm VIDEOAMARGOSA VALLEY, NV
16010/3/15HIP12740(106) Dione80mm VIDEODAMDAMA, INDIA (CONTINENT#3)
1598/31/15TYC 1075-03102-1(849) Ara80mm VIDEOSCOTTSDALE, AZ
1586/12/15TYC 2079-00938-1(2) PallasC11 VIDEOHOUSTON, TX
1575/24/15HIP49669(1669) Dagmar50mm VIDEOTHUWAL, SAUDI ARABIA (CONTINENT 3)
1564/30/15TYC 6828-01744-1(24) ThemisC8 VIDEOLA WARD, TX
1554/2/15TYC 0283-00694-1(90) Antiope80mm VIDEO (2)KRESS, TX
1543/30/15TYC 1019-01403-1(2) PallasC8 VIDEOHOUSTON, TX
1533/12/152UCAC 39817648(10) HygieaC9.25 VIDEOKINGFISHER, OK
1523/7/15HIP65567(506) Marion50mm VIDEO (5)LAS VEGAS, NV
1512/18/15TYC 1394-00796-1(71) Niobe80mm, 70mm VIDEO (4)LAKE JACKSON, TX
1501/28/15TYC 5011-00906-1(194) ProkneC8 and 80mm VIDEO (3)DAYTON, TX
1491/20/15TYC 2334-00124-1(702) Alauda70mm VIDEOFAIRBANKS, AK
1489/5/14TYC 1822-00535-1(93) Minerva70mm VIDEO (4)LAKE PARK, MN
1477/20/14HIP 65106(451) Patientia50mm VIDEO (3)CULLINAN, SOUTH AFRICA (CONTINENT#4)
1467/15/14TYC 5798-00119-1(62) EratoC8 VIDEOHOUSTON, TX
1451/21/14TYC 0184-02239-1(345) Tercidina70mm VIDEO (2)HUNTSVILLE, TX
14411/26/13TYC 2867--1816-1(134) Sophrosyne70mm VIDEO (6)LAS VEGAS, NV
14310/25/13TYC 0865-00911-1(1) Ceres70mm VIDEOALEXANDRIA, VA
1423/31/13HIP 93026(41) Daphne50mm mini VIDEONIKOI ISLAND, SUMATRA,
1413/7/13HIP 71779(329) Svea50mm mini VIDEO (5)JACKSONVILLE, FL
14011/2/12TYC 1808-01029-1(1135) ColchisC11 VIDEOMADISONVILLE, TX
13910/30/12TYC 2495-01361-1(13) EgeriaC11 VIDEOHOUSTON, TX
13812/28/11HIP54719(407) Arachne50mm mini VIDEO MCGREGOR, TX
13712/8/11TYC 2437-00787-1(593) Titania80mm midi VIDEOEHRENBERG, AZ
13611/5/11TYC 5729-02083-1(704) Interamnia80mm WATEC 120NORACLE, AZ
13510/23/11TYC 3390-00294-1(433) ErosC8 VIDEOZILLAH, WA
13410/22/11TYC 5718-00380-1(405) Thia50mm mini VIDEOACE, TX
13310/19/11TYC 6302-03055-1(43) Ariadne80mm midi VIDEO(2)+C8WHETSTONE, AZ
1329/3/11TYC 4022-01356-1(1036) Ganymed80mm mini VIDEO(2)PECOS, TX
1318/30/11TYC 6319-00425-1(558) Carmen80mm mini VIDEOBUNKIE, LA
1308/6/11TYC 0416-01196-1(194) Prokne50mm mini VIDEO (6)DENVER, CO
1297/22/112UCAC 32594510(185) EunikeC8, F3.3, Watec 120NJONES CREEK, TX
1287/19/11HIP 112420(90) Antiope50mm mini VIDEO (7)SACRAMENTO, CA
1277/04/11TYC 0292-00339-1(52) Europa80mm midi VIDEO (2)JACKSONVILLE, FL
1266/24/11TYC 6265-01474-1(405) ThiaVISUALHINTON, OK
1254/1/11TYC 1343-01414-1(554) PeragaM8 VIDEOSHAQLAWA, IRAQ (CONTINENT 3)
1241/26/11TYC 4961-00682-1(11) ParthenopeC8 INTENSIFIED VIDEOHOUSTON, TX
1231/22/11TYC 1933-00197-1(42) IsisC8 INTENSIFIED VIDEOMONT BELVIEU, TX
1221/6/11UCAC2 41706351(404) ArsinoeC8 INTENSIFIED VIDEOHOUSTON, TX
12112/4/10TYC 3358-02411-1(375) Ursula80mm Midi (3)PENWELL, TX
12011/7/10TYC 1232-00440-1(149) Medusa80mm MidiCONCORD, TX
11910/21/10TYC 1369-00979-1(268) Adorea80mm Midi (2)BIRMINGHAM, AL
11810/17/10HIP 7603(1273) Helma50mm MiniPERRY, OK
11710/14/10TYC 1346-00542-1(1212) Francette50mm Mini (2)DAVIS, OK
1168/31/10TYC 2332-01054-1(695) Bella50mm Mini (2)BAKERSIELD, CA
1158/21/10HIP 22112(16) Psyche50mm Mini (2)CLEBURNE, TX
1148/14/10TYC 1340-02164-1(404) ArsinoeC8 INTENSIFIED VIDEOREFUGIO, TX
1135/16/102UCAC43762516(276) AdelheidC11 INTENSIFIED VIDEOHOUSTON TX
1123/29/102UCAC 39108118(52) EuropaC11 INTENSIFIED VIDEOHOUSTON, TX
1112/14/10UCAC2 36090877(56) MeleteC8 INTENSIFIED VIDEOHOUSTON, TX
1102/5/10TYC 5636-00417-1(191) Kolga20inch + 80mm MidiSIERRA VISTA, AZ
10912/25/09TYC 1795-00251-1(81) Terpsichore50mm Mini (2)PATTERSON, CA
10812/24/09TYC 4909-00873-1(216) Kleopatra80mm Midi(2)CASA GRANDE, AZ
10712/6/09TYC 1252-00803-1(423) DiotimaC9.25KINGMAN, AZ
10612/6/09TYC 4682-02550-1(455) BruchsaliaC9.25KINGMAN, AZ
10512/6/09TYC 5836-00670-1(348) MayC9.25KINGMAN, AZ
10411/21/09HIP 34106(234)Barbara50mm Mini(5)POLK CITY, FL
10310/24/09HIP 10015(164)Eva50mm MiniLOXLEY, AL
1029/24/09TYC 5273-00531-1(579)SidoniaC8+80mm Midi(2)EASTLAND, WA
1018/20/09HIP75848(240)Vanadis75mm MiniNOME, TX
1006/6/09TYC 6184-00208-1(46)HestiaC8 VISUALCLEMVILLE, TX
992/17/09TYC 0193-00670-1(185)Eunike50mm mini (2)QUINCY, NM
982/7/09UCAC2 32019943(654)ZelindaM8 INTENSIFIED VIDEOMADILL, OK
972/3/09UCAC2 42749694(366)VincentinaC8 INTENSIFIED VIDEOHOUSTON, TX
9612/25/08TYC 5267-00645-1(751)FainaC8 INTENSIFIED VIDEONAVASOTA, TX
9512/8/08UCAC2 35357625(402)ChloeC11 INTENSIFIED VIDEOLIBERTY, TX
9411/27/08UCAC2 26590394(304)OlgaM8 INTENSIFIED VIDEOENID, OK
9311/15/08TYC 0543-01301-1 (1149)VolgaC8 INTENSIFIED VIDEOHOUSTON, TX
929/12/08HIP 14764(9)Metis105mm FL VIDEOLAS VEGAS, NV
906/18/08TYC 6276-01878-1(19)FortunaC11 INTENSIFIED VIDEOBEEVILLE, TX
896/12/08UCAC2 19792163(47)AglajaC8 INTENSIFIED VIDEOMAXWELL, CA
884/8/08TYC 1401-00822-1(667)DeniseM4 INTENSIFIED VIDEOHORSEHOE BAY, TX
873/15/08HIP 17026(241)Germania100mm/fl VIDEOVARADERO, CUBA
863/11/08TYC 2936-00356-1(735)MarghannaM8 INTENSIFIED VIDEOWINK, TX
852/28/08TYC 0191-00729-1 (429)LotisM8 INTENSIFIED VIDEOGARDEN CITY, TX
841/22/08TYC 0026-00627-1 (13)EgeriaC11 INTENSIFIED VIDEOCASA GRANDE, AZ
831/12/08TYC 2501-00817-1(70)Panopaea11MAK INTENSIFIED VIDEOCRYSTAL, NV
821/2/08UCAC2 38791508(24)Themis24CASS INTENSIFIED VIDEOCANEY, OK
8112/20/07TYC 2416-00772-1(187)LambertaC11 INTENSIFIED VIDEODEWEY, OK
8011/10/07TYC 1930-00091-1(15)EunomiaM4 INTENSIFIED VIDEOCALLAGHAN, TX
7911/05/08TYC 5739099761-1(137)MeliboeaC11 INTENSIFIED VIDEOANGLETON, TX
7810/26/07TYC 1410-00470-1(203)PompejaM4 INTENSIFIED VIDEOFOREST LAKE, MN
779/09/07TYC 2410-00061-1(704)InteramniaC8 INTENSIFIED VIDEOBERNALILLO, NM
768/29/07TYC 1327-00077-1(409)AspasiaC8 INTENSIFIED VIDEOSWEENEY, TX
757/20/07UCAC2 25791797(153)HildaM10 INTENSIFIED VIDEOOTHELLO, WA
747/16/07TYC 1065-00745-1(225)HenriettaC11 INTENSIFIED VIDEOLAST CHANCE, CO
737/10/07HIP92988(125)NausikaaM4 INTENSIFIED VIDEOCALLAHAN, FL
726/25/07TYC 7427-02638-1 (125)NausikaaM4 INTENSIFIED VIDEOWICKENBURG, AZ
704/15/07UCAC2 42210347(494)VirtusC8 INTENSIFIED VIDEOCORDELE, TX
692/18/07TYC 1421-00289-1(55)PandoraM4 INTENSIFIED VIDEOENNIS, TX
681/10/07TYC 1323-00422-1(44)NysaM4 INTENSIFIED VIDEOLIBERTY CITY, TX
6612/22/06TYC 4822-02645-1(547) PraxedisC8 INTENSIFIED VIDEOTRAVIS, TX
6512/14/06TYC 1231-01469-1(70) PanopaeaC8 INTENSIFIED VIDEOMADISONVILLE, TX
6411/26/062UCAC 42542715(422) BerolinaM8 VISUALTONKAWA, OK
6311/26/06TYC 5764-01407-1 (601) NerthusM8 INTENSIFIED VIDEOCOLWICH, KS
6211/22/06TYC 0040-00819-1(103) HeraC8 INTENSIFIED VIDEOCENTERVILLE, TX
6010/3/06HIP 115725(25) PhocaeaM10 INTENSIFIED VIDEOWOODSTOWN, NJ
597/22/06TYC 5109-00140-1(444) GyptisC8 INTENSIFIED VIDEOANGLETON, TX
586/24/06UCAC2 16455768(35) LeukotheaC11 INTENSIFIED VIDEOBOULOGNE, FL
575/27/06UCAC2 13791670(702) AlaudaC8 INTENSIFIED VIDEOLIVINGSTON, LA
564/30/06TYC 4973-01378-1 (580) SeleneC8 INTENSIFIED VIDEOCOLETOVILLE, TX
553/12/06HIP 90871(602) MariannaM 4 INTENSIFIED VIDEOABILENE, TX
542/24/06HIP 40832(530) TurandotM 4 INTENSIFIED VIDEOCINCINNATI, OH
532/10/06TYC-2926-01789-1(134) Sophrosyne36-INCH REFLECTOR INTENSIFIED VIDEOHOUSTON, TX
522/05/06UCAC2-35203988(764) GedaniaM 4 INTENSIFIED VIDEOPENITAS, TX
511/28/06TYC-0736-00356-1(490) VeritasM 4 INTENSIFIED VIDEOKEENANSVILLE, NC
501/14/06TYC-0145-00077-1(173) InoM 4 INTENSIFIED VIDEOLINN, TX
491/5/06TYC-1371-00938-1(466) TisiphoneC8 INTENSIFIED VIDEOTELFERNER, TX
4812/11/05UCAC2-37141382(28) ChristineC8 INTENSIFIED VIDEOHOCKLEY, TX
4712/03/05TYC 4974-00584-1(52) EuropaM 4 INTENSIFIED VIDEOLAKE HAVASU CITY, AZ
4612/11/05TYC 1799-00077-1(162) LaurentiaC8 INTENSIFIED VIDEOBUFFALO, TX
4511/15/05TYC 05227-00241-1(345) TercidinaC8 INTENSIFIED VIDEOWEIMAR, CA
4410/28/05TYC 0216-01594-1(790) PretoriaM 4 INTENSIFIED VIDEOCATOOSA, OK
4310/7/05TYC 1311-2375-1 (1082) PrirolaC8 INTENSIFIED VIDEOHOUSTON, TX
428/13/05HIP 7948(893) Julia7x35mm VISUALPENSE, SASKATCHEWAN, CANADA
417/11/05TYC 1210-01821-1(103) HeraC8 INTENSIFIED VIDEOSENTINEL, AZ
395/17/05TYC 7902-01828-1(54) AlexandraM 8 INTENSIFIED VIDEOACUFF, TX
381/18/05UCAC 32014147(216) KleopatraC8 INTENSIFIED VIDEOHOUSTON, TX
3710/29/04TYC 1367-00024-1(8) FloraM 4 INTENSIFIED VIDEOOROGRANDE, NM
3610/7/04TYC 1351-00528-1(8) FloraC8 INTENSIFIED VIDEOCLINTON, BC CANADA
359/5/04TYC 5244-00017-1(107) CamillaC8 INTENSIFIED VIDEOFOUNTAIN HILLS, AZ
348/25/04TYC 6859-01200-1(11) ParthenopeC8 INTENSIFIED VIDEOALVIN, TX
337/18/04TYC 0531-02020-1(41) DaphneC8 INTENSIFIED VIDEOFRIENDSWOOD, TX
327/3/04TYC 1215-01306-1(64) AngelinaC8 INTENSIFIED VIDEOKRAMER JUNCTION, CA
316/30/04TYC 6310-01494-1(522) HelgaC8 INTENSIFIED VIDEOINYOKERN, CA
3012/31/03TYC 1397-01764-1(208) LacrimosaC8 INTENSIFIED VIDEOSPLENDORA, TX
2912/14/03TYC 2389-01522-1(231) VindobonaC8 INTENSIFIED VIDEOMOUNTAINAIRE, AZ
2812/7/03TYC 5769-00278-1(115) ThyraC8 INTENSIFIED VIDEOARIZONA CITY, AZ
2710/24/03HIP 106841(978) AidaminaC8 INTENSIFIED VIDEOTX, NM BORDER
257/29/03TYC 6285-03426-1(654) ZelindaC8 INTENSIFIED VIDEOSTILLWELL, OK
246/18/03TYC 0530-01006-1(85) IoC8 INTENSIFIED VIDEOHOUSTON, TX
233/23/03HIP 36189(704) InteramniaM12 VIDEOKONA, HI
221/15/03TYC 0191-00774-1(95) ArethusaC8 VISUALMCCOOK, TX
211/3/03TYC 4848-02317-1(726) JoellaC8 INTENSIFIED VIDEOCASH, TX
201/1/03TYC 0726-00419-1(233) AsteropeC8 INTENSIFIED VIDEOSANTA FE, TX
1911/14/02TYC 0111-01007-1(350) OrnamentaC8 INTENSIFIED VIDEOODEM, TX
188/13/02TYC 5236-00201-1(688) MelanieC8 INTENSIFIED VIDEOHOUSTON, TX
175/24/02TYC 6252-01873(102) MiriamC8 INTENSIFIED VIDEORIO RICA, AZ
164/20/02TYC 6148-00023(139) JuewaC8 INTENSIFIED VIDEOOAK RIDGE, CA
153/27/02TYC 0168-02620(654) ZelindaC8 INTENSIFIED VIDEOVIOLA, KS
141/14/02SAO 060107(516) AmherstiaC8 INTENSIFIED VIDEOATLANTIC BEACH, FL
129/8/01TYC1315-01463-1(48) Doris17-INCH REFLECTOR VISUALHOUSTON, TX
1112/4/97SAO 134036(105) ArtemisC8 VISUALPHOENIX, AZ
1012/17/96BD+3 633(704) InteramniaC8 VISUALPHOENX, AZ
910/9/93PPM 174714(27) EuterpeM10 VISUALDUMAS, TX
81/3/91SAO 93228(4) VestaC8 VIDEOLAPEER, MI
74/11/85BD+20 2390(129) AntigoneC8 VISUALPARKER, CO
65/29/831 Vulpeculae(2) PallasC8 VISUALSPLENDORA, TX
54/26/83BD+21 1797(52) EuropaC8 VISUALHOUSTON, TX
411/15/82SAO55791(375) UrsulaC8 VISUALWINNIE, TX
310/7/81SAO 187124(88) ThisbeC8 VISUALCHEYENNE, WY
13/5/77Gamma Ceti(6) Hebe5R VISUALVICTORIA, TX (CONTINENT#1)