1963AJ 68 . . 644H , and avalueof232°Kwas obtainedforthecenter probe withVenusinDecember 1962thetemperature of thedisk. of Venusat11.9/xwasmeasured withthepyrometer, 3.75 /x. 644 established atbothofthesewavelengths.InApril in November1962theinfraredspectrometerwas graphic Society. A. Geoffrion,F.Holden,W.Krzeminski,andJ.B. 3.75 ju).Onlyanupperlimitof230°Kcouldbe dark side,ofVenusattwowavelengths(3.5and used bySintontomeasurethetemperatureof part, byasupportinggrantfromtheNationalGeo- K. Yu. August 1962.Thefollowingwereplacedontempo- Ford, Jr.,F.Gifford,M.Goss,K.Kwee,and and H.J.Wood.ResignationswereL.W.Fredrick, man, E.C.Roepke,R.Robinson,D.G.Walker, rary appointment:J.E.Armstrong,D.W.Weed- distribution. Thisworkhasbeenmadepossible,in presently engagedinsuchwork.Thesamematerial the BrighterPlanets,"willbemadeavailablenext pany. Deliveryofthisdiskisscheduledtotakeplace Duran-50 glasswasorderedfromSchottandCom- Lowell Observatory,Flagstaff,Arizona will laterbepublishedinbookformformoregeneral have donesignificantworkontheplanets,orare year tothoseobservatoriesorotherinstitutionsthat has yetbeenawarded.Thismirrorwillreplacethe required incompletingthemirror,butnocontract on 1September1963.Bidswerereceivedforwork Priser. GuestInvestigatorswere:W.Beavers,K. 1961, atemperatureof236°Kwasmeasuredat brighter planetsentitled,“APhotographicStudyof ing 62platesofphotographicreproductionsthe now hasasurfacewhichbeenetchedbycleaning in November.Substantialprogresshasbeenmade procedures usedovermanyyearsaspartofthe 69-inch whichismadeofhighexpansionglass,and in theproductionof6200Cronopaqueprintsshowing ary, anotherhousehasbeensubdividedintotwo the brighterplanets.Averylimitededitioncontain- apartments andbachelorquarters. the helpofaNationalScienceFoundationgrant. these modificationshavebeenmadepossiblewith kins telescope.Thereplacementmirrorandallof to improveandmodernizetheoperationofPer- resilvering procedure.Manychangeshavebeenmade Mars (1905-1961),byE.C.Slipherwaspublished A biréfringentinterferometer (Astron.J.67,647, Personnel. S.E.Joneswasaddedtothestaffin During thetimeofencounter oftheMariner At thetimeofinferiorconjunctionVenus Physical Plant.A72-inchdiskoflowexpansion Planetary Studies.“ThePhotographicHistoryof A newDirector'sHousewascompletedinJanu- © American Astronomical Society • Provided by theNASA Astrophysics Data System OBSERVATORY REPORTS ß Peg,andoGet.InFebruary1963itwasattached tive gradientswerefound to berelatedinalinear means ofthesamephotoelectricequipmentutilized tune, theircomparisonstars,andotherstarsby the followingstars:aHer,gRSer,Lyr, with the42-inchreflectorofVenus,Jupiter,aOri, manner totheB—Vcolors ofseveralstars.Asa planets intheblueregionof thespectrum.Therela- made byJ.S.HalloftheplanetsUranusandNep- case washigherthanthatachievedduringtheob- result ofthesemeasurements thefinalequivalent determine accuraterelative gradientsofthetwo in theregularobservations. Thesedatawereusedto tudes areasfollows: reduce theinterferogramstospectraonanIBM7090 gan reflector. planetary photographsofVenus,Mars,Jupiterand ferometer hasnowbeenadaptedtothe69-inch of Mars,200-inchobservationswerealsomade red spectrometer.Inadditiontotheinterferograms 6 second-of-arcresolutiononthediskandaspectral at 3.5/X.Goodinterferogramswereobtainedwitha to the200-inchPalomarreflectorforobservations W. M.Sinton.Thefirstobservationsweremade assumption ofauniformdisk,theobservedmagni- these havebeencorrectedfordistance,phase,and blue magnitudesforbothplanetswerederived,as unapodized andanapodizedspectrum. used toincreasethecomputationspeed.Theprocess- tions andtheTchebycheffrecursionrelationsare magnitude atthetimeofobservation.Theinter- X Her,TLyr,SSVir,andSCep.Severalofthese servations ofMarsin1958and1960withtheinfra- resolution of0.03/xat3.5/x.Theineach during thetwilighthours.Marswasobservedin previously, bymeansofleast-squaressolutions.After by J.B.Priseratthe21-inchtelescope.Thefinal mary standardsand10-yearwereobtained with the24-inchLowellrefractorandMor- ing timeisaboutoneminutetoproducebothan computer. Polynomialsineandcosineapproxima- late-type variablestarswerefainterthan9thvisual order tocontinuethestudyof“vegetation"bands Neptune togetherwiththeircomparisonstars,pri- 50 starsarewithinreachofthisinstrument. Perkins telescopewhereitisexpectedthatabout Saturn weretakenbyH.L.GiclasandS.E.Jones 1962) hasbeencompletedandputintooperationby (in thecaseofUranusonly)foroblateness,on Planetary Photography.Onehundredandfour Solar Variations.ObservationsofUranusand Several spectrophotometriccomparisonswere Miss A.Geoffrionhascompletedaprogramto Uranus 6?022±0^001, Neptune 8?248±0“003. 1963AJ 68 . . 644H , B —VcolorsofUranusandNeptuneintheblue filter regionwerefoundtobe+0V704forUranus spectral typeG5forUranus,andG4Neptune. and +0“667forNeptune.Thesecolorscorrespondto / The correspondingB—Vvaluesassumedforthese planets andusedinallpreviousyearsthereduc- tion ofthedatawere+0“721and+0V628for Uranus andNeptune,respectively.Thedifference between theobservedandassumedvalueshasnot caused appreciableerrorsinthereductions. gram hasbeencarriedon,thebrightnessofUranus with atotalamplitudeofabout0.8%.Presumably, almost linearfashion.ThebrightnessofNeptune, has progressivelyincreasedfrom6“07to6^02inan on theotherhand,hasincreasedandthendecreased unknown effectscausedbylimbdarkeningcoupled (The sunisgenerallyconsideredtobeoftypeG2.) the periodofobservationhascauseditsprogressive with thepeculiarchangeinaspectofUranusduring increase inbrightness. grant wasagainawardedtotheLowellObservatory for thecontinuationof“ProperMotionSurvey Giclas, foraperiodofthreeyears.Aspreviously, graphic TelescopeunderthedirectionofHenryL. of theNorthernHemispherewith13-inchPhoto- on thisprogram. R. Burnham,Jr.,andN.G.Thomasareworking publication 3409starswithmotion>0'/26/yrare Way werecompleted,andtheresultsfromatotal tabulated ofwhich1258werenotpreviouslyknown. of 50plateswerepreparedforpublicationinLowell motions >0'/5/yr,35newpairswithcommonmotion, Of thisgroup18havemotions>l.0/yr,170with Observatory BulletinNo.120nowinpress.Inthis and 40whitedwarfsuspectsarelisted. types ofmica-windowtubesandcascadedboth Fredrick havemadenumeroustestswithdifferent at the24-inchMorgantelescope,andPerkins telescope. (Detaileddescriptionsofthesetechnical of theCarnegieInstitutionWashington.)Fredrick developments maybefoundintheannualreports indication thattheCNbandsinonemicron a spectrographdesignedbyFordtoobtaininfrared has usedamica-windowimageconvertortubewith spectra ofsixlate-typegiantstars.Hehasfound class ofthesestars. region maybeexcellentindicatorsoftheluminosity 9800 and11000Âwitha single-stage mica-window laboratory spectraofmethane andammoniabetween being comparedwithspectra ofJupiterandSaturn. image tubeatadispersion of46Â/mm.Theseare Good matchesoftheintensity ofthebandswere Over aperiodoftenyearsduringwhichthispro- Proper Motion.ANationalScienceFoundation Eighteen regions,manyinandneartheMilky Image TubeProjects.W.K.Ford,Jr.,andL. © American Astronomical Society • Provided by theNASA Astrophysics Data System W. M.SintonandL.Fredrick obtainedlong-path OBSERVATORY REPORTS obtained witha22-mpathofmethaneatpressure path ofammoniaatapressure0.6atmforJupiter. of 5atmforJupiterandSaturn,witha22-m a coldboxforworkintheinfraredwerecompleted No ammonialineswerediscoveredonSaturn. photoelectric studyofthenucleigalaxies.The under thesupervisionofW.Tifftinconnectionwith offset guiderwasconstructedintheshopof an OfficeofNavalResearchprojectfor8-color arrangement betweentheLowellandPerkinsOb- galaxies havebeeninitiatedinfour“blue”spectral servatories. Anintegratingsystemforusework Perkins Observatoryasapartofthecollaborative on faintobjectsisnearlycompleted.Observationsof of-arc. regions withaperturesrangingfrom10to70sec- the datahasbeenpreparedforpress.Thestar c RRLyraestar,DHPegasi,andthediscussionof closely resemblesTSextantisandisverystablein proper motionstars,concentratedinregionsG-49, light andcolorvariation.Workonseveraladditional way. Four-colorphotometryofaselectionGiclas RR Lyraevariables,includingTVBootis,isunder- G-51 andG-94,isbeingcarriedon. made observationsofEMCyg,anotherbinarysys- Kraft, madephotoelectricobservationsoftheultra- collaboration withKraftandMumfordhehasalso short periodeclipsingbinary;NovaW2Sge.In tem. ObservationsofUGeminorumwerecontinued with anH/?interferencefilter. being carriedonjointlywithA.Elviusofthe with the69-inchPerkinstelescope.Thisstudyis ther photoelectricobservationsofCentaurusA(NGC made withseveraltelescopesandcontemporane- Uppsala Observatory. 5128) andthenebulositysurroundingPleiades belt wereobtainedduringMayandJune1963by ously withA.Hoag.Positiveresultswere Priser, Tifft,andSinton.Theseobservationswere obtained, althoughthebeltwasfoundtobewider tuations andisaboutof1%thedarksky.A to haveabrightnesscomparabletheairglowfluc- than predictedorreportedbyradiodata.Itappears joint reporthasbeensubmittedforpublicationin Science. on the“GalaxyandMagellanic Clouds”heldin Canberra andSydney,Australia. Symposium on“Infrared Observations ofVenus.” Photoelectric Photometry.Anewoffsetguiderand Tifft hascompletedUBVphotometryofthetype W. Krzeminski,incooperationwithDr.R.P. Polarisation Measurements.J.S.Hallmadefur- West Ford.ObservationsoftheForddipole W. TiffttookpartintheIAUSymposiumNo.20 W. M.Sintonpresented a paperattheLiège John S.Hall,Director 645