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117P/Helin-Roman-Alu

Orbital period : 8.25 years

NASA/JPL elements
IAU/MPC elements

Magnitude and Afrho plots

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Statistics



Num Date
[TU]
 Julian day
-2400000		 Comet/Object Name r
(/Sun)
[AU]		 d
(/Earth)
[AU]		 Pict
 Spec
 Coma
Total
mag
(m1)
 Nuclear
mag
(m2)
 Coma
diameter
[']
 Coma
conden
sation		 Tail
length
[°]		 Tail
position
angle
[°]		 Afrho
[cm]		 Instr
diameter
[mm]		 Instr m1
aperture
radius
[']
 m2
aperture
radius
["]
 Obs
MPC
code		 Who
276082023 09 21.160209.63097117P/Helin-Roman-Alu 3.658 2.669Pict--16.5 --- - -350L -5.6X03jpdesgrees
271562023 06 08.460104.91006117P/Helin-Roman-Alu 3.433 3.571Pict--17.2 --- - -350L -6X03ptraverse
271222023 05 30.360095.8565117P/Helin-Roman-Alu 3.415 3.671Pict--17 --- - -350L -5.6X03hroy
261392022 10 16.759870.25452117P/Helin-Roman-Alu 3.080 3.071Pict--15.4 --- - -400L -5.8A77fkugel
260972022 10 07.059860.5001117P/Helin-Roman-Alu--Pict--15.8 --- - -350L -5.6X03hroy
260652022 09 29.959853.48745117P/Helin-Roman-Alu 3.068 2.831Pict--15.7 --- - -350L -5.6X03hroy
259082022 08 28.859821.32679117P/Helin-Roman-Alu 3.050 2.408Pict--15 --- - -400L -5.8A77fkugel
258942022 08 24.859817.3365117P/Helin-Roman-Alu 3.049 2.362Pict--15.2 --- - -410L -4.2A77jnicolas
257442022 07 26.759788.20094117P/Helin-Roman-Alu 3.041 2.103Pict--15.3 --- - -355T --XXXaleroy
256542022 06 30.359761.83847117P/Helin-Roman-Alu 3.040 2.032Pict--14.2 --- - -350L -5.6X03jpdesgrees
255482022 05 10.159710.62706117P/Helin-Roman-Alu 3.054 2.377Pict--15 --- - -400L -5.8A77fkugel
255242022 05 01.159701.61924117P/Helin-Roman-Alu 3.058 2.487Pict--15 --- - -400L -5.8A77fkugel
253442022 04 03.159673.6658117P/Helin-Roman-Alu 3.077 2.872Pict--14.9 --- - -400L -5.8A77fkugel
250782022 02 14.359625.86681117P/Helin-Roman-Alu 3.122 3.542Pict--15.5 --- - -350L -6X03ptraverse
237142021 08 02.859430.34643117P/Helin-Roman-Alu 3.443 3.632Pict--16.8 --- - -400L -5.8A77fkugel
236742021 07 26.059422.50407117P/Helin-Roman-Alu 3.457 3.551Pict--16.4 --- - -350L -5.6X03jlvirlichie
234572021 06 06.859373.37958117P/Helin-Roman-Alu 3.563 2.967Pict--16.1 --- - -400L -5.8A77fkugel
234122021 05 31.959367.40419117P/Helin-Roman-Alu 3.576 2.908Pict-15.316 --- - -400L 0.45.8A77fkugel
234182021 05 31.859367.38038117P/Helin-Roman-Alu 3.576 2.908Pict--16.4 --- - -200T -6.75K22mdeldem
233832021 05 19.959355.40207117P/Helin-Roman-Alu 3.602 2.805Pict--14.7 --- - -400L -5.8A77jgbosch
233622021 05 11.859347.39601117P/Helin-Roman-Alu 3.619 2.751Pict--14.8 --0.23 - -400L -5.8A77jgbosch
233632021 05 11.859347.34006117P/Helin-Roman-Alu 3.619 2.751Pict--16.4 --- - -200L -6.25G20ydegotlonghi
233542021 05 08.959344.41478117P/Helin-Roman-Alu 3.626 2.734Pict--15.7 --- - -400L -5.8A77jgbosch
233392021 05 05.859341.36594117P/Helin-Roman-Alu 3.633 2.720Pict--15.9 --0.5 - -400L -5.8A77fkugel
233402021 05 05.859341.3279117P/Helin-Roman-Alu 3.633 2.720Pict--16.3 --- - -200L -6.25G20ydegotlonghi
233312021 05 03.959339.41077117P/Helin-Roman-Alu 3.637 2.711Pict--15.8 --0.14 - -400L -5.8A77jgbosch
233102021 05 02.859338.33391117P/Helin-Roman-Alu 3.639 2.707Pict--16.4 --- - -200L -6.25G20ydegotlonghi
232852021 04 23.859329.34654117P/Helin-Roman-Alu 3.659 2.685Pict--14.4 --- - -400L -5.8A77jgbosch
231982021 04 08.959314.40221117P/Helin-Roman-Alu 3.692 2.698Pict--15.1 --- - -400L -5.8A77jgbosch
231562021 04 02.859308.37597117P/Helin-Roman-Alu 3.706 2.722Pict--14.3 --- - -400L -5.8A77jgbosch
231192021 03 24.959299.4405117P/Helin-Roman-Alu 3.726 2.777Pict--15.5 --- - -400L -5.8A77jgbosch
225742020 11 05.259159.71162117P/Helin-Roman-Alu 4.037 4.804Pict--17.5 --- - -400L -5.8A77fkugel
220512020 05 18.958989.47491117P/Helin-Roman-Alu 4.393 4.270Pict--18.5 --- - -350L -7X03ptraverse
216832020 03 01.858911.37049117P/Helin-Roman-Alu 4.538 3.571Pict--18.2 --- - -200T -5.1G20ydegotlonghi
215642020 02 04.158884.65496117P/Helin-Roman-Alu 4.583 3.663Pict--18.7 --- - -350L -7X03ptraverse
166732016 12 04.857728.37575117P/Helin-Roman-Alu 4.741 3.780Pict--17.8 --- - -300L -8.1C10jfsoulier
167952016 12 03.957727.45946117P/Helin-Roman-Alu 4.739 3.775Pict--18.1 --- - -430L -6.5958pdupouy
164692016 11 06.257699.75077117P/Helin-Roman-Alu 4.699 3.746Pict--17.5 --- - -400Y -6.2W96jgbosch
164032016 10 26.257688.70351117P/Helin-Roman-Alu 4.682 3.798Pict--17.9 --- - -400Y -6.2W96jgbosch
163212016 10 12.157674.61759117P/Helin-Roman-Alu 4.660 3.910Pict--18.8 --- - -410L -4.2A77jnicolas
163082016 10 10.257672.72976117P/Helin-Roman-Alu 4.656 3.929Pict--17.9 --- - -400Y -6.2W96jgbosch
162682016 10 07.157669.61584117P/Helin-Roman-Alu 4.652 3.960Pict--17.6 --- - -400L -5.5A77fkugel
161842016 09 29.157661.65217117P/Helin-Roman-Alu 4.639 4.049---18.8 --- - -400L -5.5A77fkugel
161862016 09 29.057661.55182117P/Helin-Roman-Alu 4.639 4.049Pict--18.2 --- - -300L -8.1C10jfsoulier
161782016 09 28.157660.65315117P/Helin-Roman-Alu 4.637 4.060Pict--18.6 --0.16 - -400L -5.5A77fkugel
161712016 09 27.357659.81575117P/Helin-Roman-Alu 4.635 4.072Pict--17.8 --- - -400Y -6.2W96jgbosch
149002015 12 14.857372.36336117P/Helin-Roman-Alu 4.080 3.621---17.4 --- - -430L -4.9958pdupouy
148022015 11 29.857357.34546117P/Helin-Roman-Alu 4.047 3.386---17.1 --- - -430L -4.9958pdupouy
144042015 09 10.057276.58423117P/Helin-Roman-Alu 3.870 3.018Pict--17.2 --- - -400L -5.8A77fkugel
143352015 08 27.257262.73409117P/Helin-Roman-Alu 3.839 3.126Pict--16.4 --- - -400Y -5.6W96jgbosch
142502015 08 10.357245.8202117P/Helin-Roman-Alu 3.801 3.299Pict--16.7 --- - -400Y -5.6W96jgbosch
140832015 07 06.357210.8429117P/Helin-Roman-Alu 3.723 3.718Pict--16.6 --- - -400Y -5.6W96jgbosch
140542015 06 25.357199.85326117P/Helin-Roman-Alu 3.699 3.849Pict--16.9 --- - -400Y -5.6W96jgbosch
130382014 12 09.757002.2219117P/Helin-Roman-Alu 3.298 3.670Pict--15.8 --- - -410L -5.6A77jnicolas
129542014 11 19.756982.23885117P/Helin-Roman-Alu 3.265 3.379Pict--16 --- - -200T -7.5A77fkugel
127372014 10 13.856945.30372117P/Helin-Roman-Alu 3.208 2.815Pict--15.4 --- - -200T -15A77fkugel
127092014 10 08.756940.28745117P/Helin-Roman-Alu 3.201 2.743---15.8 --- - -200T -15A77fkugel
125672014 09 20.056921.56433117P/Helin-Roman-Alu 3.176 2.499Pict--15.8 --0.10 - -400Y -5.5W96jfsoulier
125302014 09 13.856915.32987117P/Helin-Roman-Alu 3.168 2.416Pict--16.3 --- - -400L -7.8A77fkugel
121952014 07 29.256868.78951117P/Helin-Roman-Alu 3.117 2.116Pict--15 --- - -400Y -5.6W96jgbosch
120832014 07 18.056857.52817117P/Helin-Roman-Alu 3.107 2.124Pict--14.5 --- - -200T -15A77fkugel
120322014 07 02.356841.81239117P/Helin-Roman-Alu 3.094 2.190Pict--15.3 --- - -400Y -5.5W96jfsoulier
119152014 06 10.256819.72173117P/Helin-Roman-Alu 3.079 2.369---15.2 --- - -400Y -5.6W96jgbosch
118892014 06 07.256816.75579117P/Helin-Roman-Alu 3.077 2.399Pict--15.4 --- - -400Y -5.6W96jgbosch
119012014 06 04.156813.68777117P/Helin-Roman-Alu 3.075 2.431---15.5 --- - -400Y -6.9W96jfsoulier
118392014 05 24.356802.84964117P/Helin-Roman-Alu 3.070 2.556Pict--15.9 --- - -400Y -5.6W96jgbosch
117972014 05 16.356794.87763117P/Helin-Roman-Alu 3.066 2.654---16.2 --- - -400Y -5.6W96jgbosch
117722014 05 10.256788.77471117P/Helin-Roman-Alu 3.064 2.729Pict--16.1 --0.1583 - -400Y -4.2W96jgbosch
117692014 05 09.256787.72479117P/Helin-Roman-Alu 3.064 2.742Pict-14.715.8 --- - -400Y 0.75.6W96tnoel
117542014 05 07.356785.84475117P/Helin-Roman-Alu 3.063 2.768Pict--16 0.78-0.10 - -400Y -5.5W96jfsoulier
117342014 05 03.356781.83633117P/Helin-Roman-Alu 3.062 2.820Pict--16 --- - -400Y -5.6W96jgbosch
117062014 04 30.356778.85382117P/Helin-Roman-Alu 3.061 2.859Pict--16.2 --- - -400Y -5.5W96jfsoulier
116692014 04 24.356772.82747117P/Helin-Roman-Alu 3.059 2.938Pict--16 --0.1333 - -400Y -5.6W96jgbosch
116322014 04 18.356766.83995117P/Helin-Roman-Alu 3.058 3.016Pict-15.516.1 --- - -400Y 0.45.6W96tnoel
115712014 04 09.356757.8548117P/Helin-Roman-Alu 3.057 3.134Pict--16.1 --- - -400Y -5.6W96jgbosch
115392014 04 05.356753.87056117P/Helin-Roman-Alu 3.057 3.185Pict--16.6 --- - -400Y -3.5W96jgbosch
115112014 03 31.356748.85949117P/Helin-Roman-Alu 3.056 3.249Pict--16.1 --- - -400Y -5.5W96jfsoulier
114472014 03 21.356738.86022117P/Helin-Roman-Alu 3.056 3.372Pict--15.7 --- - -400Y -9.6W96tnoel
097042013 06 18.056462.55434117P/Helin-Roman-Alu 3.343 2.644---16 --- - -400Y -4.5W96jfsoulier
096292013 06 12.956457.42144117P/Helin-Roman-Alu 3.354 2.591Pict--15.4 --- - -410L -8.4A77jnicolas
095952013 06 06.856451.38079117P/Helin-Roman-Alu 3.365 2.543Pict--15.3 --- - -200T -18.8A77fkugel
096782013 06 04.056448.56456117P/Helin-Roman-Alu 3.369 2.528---15.7 --- - -400Y -4.5W96jfsoulier
095102013 05 17.056430.53645117P/Helin-Roman-Alu 3.403 2.439---15.6 --- - -300T -6958pdupouy
095052013 05 16.056429.52179117P/Helin-Roman-Alu 3.405 2.436---15.7 --- - -300T -6958pdupouy
093982013 05 06.956420.42904117P/Helin-Roman-Alu 3.425 2.425---15.5 --- - -410L -8.4A77jnicolas
094282013 04 21.056404.54703117P/Helin-Roman-Alu 3.455 2.461---15.2 --- - -250T -6958pdupouy
091932013 04 21.056404.5059117P/Helin-Roman-Alu 3.455 2.461Pict--15.7 --- - -320L -6B92maudejean
094232013 04 20.056403.57584117P/Helin-Roman-Alu 3.457 2.466---15.3 --- - -250T -6958pdupouy
091672013 04 14.956398.4845117P/Helin-Roman-Alu 3.469 2.500---15.4 --- - -200T -18.75A77fkugel
094192013 04 13.956397.49146117P/Helin-Roman-Alu 3.471 2.506---15.3 --- - -250T -6958pdupouy
096452013 04 13.156396.60971117P/Helin-Roman-Alu 3.471 2.506---16.2 --- - -400Y -4.5W96jfsoulier
090562013 04 03.056386.52452117P/Helin-Roman-Alu 3.491 2.588---15.6 --- - -250T -6958pdupouy
090992013 03 24.056376.55056117P/Helin-Roman-Alu 3.512 2.693---15.6 --- - -300T -6958pdupouy
090882013 03 22.056374.5227117P/Helin-Roman-Alu 3.516 2.717---16.6 --- - -300T -6958pdupouy
090342013 03 21.056373.59594117P/Helin-Roman-Alu 3.518 2.729---15.8 --- - -250T -6958pdupouy
089842013 03 16.156368.60439117P/Helin-Roman-Alu 3.529 2.792Pict--16.1 --- - -200L -9B83tnoel
088772013 03 04.056356.58198117P/Helin-Roman-Alu 3.554 2.962---16.7 --- - -250T -6958pdupouy
088912013 02 27.156351.67295117P/Helin-Roman-Alu 3.565 3.038---16.4 --- - -300T -6958pdupouy
087282013 02 23.056347.58325117P/Helin-Roman-Alu 3.573 3.101---16.4 --- - -250T -6958pdupouy
087232013 02 21.056345.58967117P/Helin-Roman-Alu 3.578 3.133---16.4 --- - -250T -6958pdupouy
086812013 02 20.156344.66074117P/Helin-Roman-Alu 3.580 3.149Pict--16.5 --- - -300L -8C10jfsoulier
087162013 02 20.156344.60864117P/Helin-Roman-Alu 3.580 3.149---16.5 --- - -250T -6958pdupouy
087072013 02 19.056343.58318117P/Helin-Roman-Alu 3.582 3.165---16.6 --- - -250T -6958pdupouy
087012013 02 17.156341.65197117P/Helin-Roman-Alu 3.586 3.198---16.6 --- - -250T -6958pdupouy
087382013 02 16.156340.63051117P/Helin-Roman-Alu 3.588 3.215---16.7 --- - -300T -6958pdupouy
086582013 02 12.156336.6767117P/Helin-Roman-Alu 3.597 3.281---17.2 --- - -430L -6958pdupouy
085172013 02 09.156333.66498117P/Helin-Roman-Alu 3.603 3.331---16.4 --- - -80R -7.4A77fkugel
086312013 01 22.156315.64868117P/Helin-Roman-Alu 3.642 3.636---17.4 --- - -430L -6958pdupouy
064672012 04 22.856041.38719117P/Helin-Roman-Alu 4.243 3.579---17.8 --- - -300L -7.5C10jfsoulier
064662012 04 21.856040.38199117P/Helin-Roman-Alu 4.245 3.569Pict--17.4 --0.03 - -300L -7.5C10jfsoulier
066422012 04 17.056035.52412117P/Helin-Roman-Alu 4.253 3.531---17.4 --- - -300L -6958pdupouy
063902012 03 25.956013.47326117P/Helin-Roman-Alu 4.300 3.379---17.5 --- - -300L -6958pdupouy
063842012 03 24.956012.46882117P/Helin-Roman-Alu 4.302 3.376---17.7 --- - -300L -6958pdupouy
063792012 03 24.056011.55773117P/Helin-Roman-Alu 4.302 3.376---17.7 --- - -300L -6958pdupouy
063762012 03 23.056010.51062117P/Helin-Roman-Alu 4.304 3.372---17.6 --- - -300L -6958pdupouy
063702012 03 19.956007.42609117P/Helin-Roman-Alu 4.312 3.362---17.5 --- - -300L -6958pdupouy
093412012 03 16.956004.49538117P/Helin-Roman-Alu 4.318 3.357---17.2 --- - -200L -6.6511larnold
059892012 03 15.956003.47425117P/Helin-Roman-Alu 4.320 3.356Pict--17.2 --- - -300L -7.5C10jfsoulier
093442012 03 14.956002.4042117P/Helin-Roman-Alu 4.322 3.355---17.2 --- - -200L -6.6511larnold
024132011 04 07.955660.49455117P/Helin-Roman-Alu 4.875 4.511Pict--19.7 --- - -254L -4C10jfsoulier
023292011 03 25.855647.35751117P/Helin-Roman-Alu 4.890 4.340Pict--18.2 --0.5 280 -500L -6A77fkugel
020482011 02 25.855619.3332117P/Helin-Roman-Alu 4.921 4.060---18.6 --- - -500L --A77fkugel
018852011 02 08.755602.28146117P/Helin-Roman-Alu 4.939 3.982Pict--18.5 --- - -500L --A77fkugel
011402010 11 08.155509.674117P/Helin-Roman-Alu 5.023 4.893Pict--19.1 --- - -500L --A77fkugel
030462009 11 16.955153.49438117P/Helin-Roman-Alu 5.120 4.437---19.9 --- - -500L --A77fkugel
032482009 01 20.754853.24718117P/Helin-Roman-Alu 4.921 4.310---18.2 --- - -500L --A77fkugel
032212008 12 18.754820.25773117P/Helin-Roman-Alu 4.884 3.948---17.9 --- - -500L --A77fkugel
031972008 12 06.754808.27269117P/Helin-Roman-Alu 4.870 3.889---17.5 --- - -500L --A77fkugel
028702008 01 28.854495.30212117P/Helin-Roman-Alu 4.369 4.406---17.5 --- - -500L --A77fkugel
028612008 01 20.754487.28643117P/Helin-Roman-Alu 4.353 4.265---17.3 --- - -500L --A77fkugel
053312007 09 15.154359.65069117P/Helin-Roman-Alu 4.089 3.325Pict--16.5 --- - -600L --586jbdevanssay

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