• Processing (Info)

    • MPEC 1995-C11 : COMET P/1989 T2 (HELIN-ROMAN-ALU 1)

    The following Minor Planet Electronic Circular may be linked-to from your own Web pages, but must not otherwise be redistributed electronically.

    A form allowing access to any MPEC is at the bottom of this page.

    Read MPEC 1995-C10 Read MPEC 1995-C12 

    M.P.E.C. 1995-C11                                Issued 1995 Feb. 3, 23:19 UT

     The Minor Planet Electronic Circulars contain information on unusual
         minor planets and routine data on comets.  They are published
   on behalf of Commission 20 of the International Astronomical Union by the
          Minor Planet Center, Smithsonian Astrophysical Observatory,
                          Cambridge, MA 02138, U.S.A.

          MARSDEN@CFA or WILLIAMS@CFA (.HARVARD.EDU, .SPAN or .BITNET)

                       COMET P/1989 T2 (HELIN-ROMAN-ALU 1)

This comet has been observed all around its orbit.

Additional observations:
    PJ89T020  C1995 01 28.46318 13 27 03.79 +01 26 46.9                      691
    PJ89T020  C1995 01 28.46568 13 27 03.84 +01 26 46.8                      691
    PJ89T020  C1995 01 28.47050 13 27 03.90 +01 26 47.2                      691
    PJ89T020  C1995 01 29.48024 13 27 14.13 +01 27 35.2          19.7 T      691
    PJ89T020  C1995 01 29.48269 13 27 14.15 +01 27 35.5          19.6 T      691
    PJ89T020  C1995 01 29.48494 13 27 14.19 +01 27 35.6          19.7 T      691
    PJ89T020  C1995 02 01.51391 13 27 39.51 +01 30 31.1          21.2 N      691
    PJ89T020  C1995 02 01.53054 13 27 39.58 +01 30 31.9          19.3 T      691
    PJ89T020  C1995 02 01.54492 13 27 39.72 +01 30 32.8          19.2 T      691

Observer details:
691 Steward Observatory, Kitt Peak.  Observers S. M. Larson, C. W.
    Hergenrother, J. V. Scotti.  2.3-m Steward reflector (Jan. 28-29)
    and 0.9-m Spacewatch telescope (Feb. 1).

Orbital elements:
    P/1989 T2 (Helin-Roman-Alu 1)
Epoch 1997 Mar. 13.0 TT = JDT 2450520.5
T 1997 Mar. 26.86970 TT                                 Marsden
q   3.7148037            (2000.0)            P               Q
n   0.10302089     Peri.  215.07650     +0.31018748     +0.93673179
a   4.5066365      Node    73.47353     -0.82897125     +0.35004696
e   0.1757037      Incl.    9.74228     -0.46539272     +0.00082426
P   9.57
Residuals in seconds of arc
880810 675 (2.8+  3.0-)   891020 413  1.0+  0.5-    930124 691  0.2+  0.2+
880810 675  1.0+  1.4-    891023 372  0.6+  1.3-    930125 691  0.8-  0.3-
880812 675  0.2+  1.1-    891023 372  0.3+  0.1+    930125 691  0.0   0.3+
890907 675  1.0-  0.6-    891025 801 (2.3-  0.2-)   930125 691  0.6-  0.7+
890907 675  0.1+  0.2-    891026 675  0.2-  1.3-    950128 691  0.3-  0.5-
890908 675 (3.4-  3.2-)   891028 675  1.0-  0.1+    950128 691  0.1+  0.7-
891002 675  0.4+  0.6-    891029 801  0.6+  1.4+    950128 691  0.3+  0.5-
891002 675  0.1+  1.9-    891029 801  0.6+  0.2+    950129 691  0.5+  0.9-
891005 675 (3.1+  3.0-)   891031 372 (4.1+  0.4-)   950129 691  0.5+  0.7-
891006 675 (0.2+  5.6-)   891129 675 (3.0+  1.2-)   950129 691  0.8+  0.7-
891006 675 (0.1-  4.3-)   891201 675 (2.4+  0.3-)   950201 691  1.7-  0.8-
891008 413  0.7+  0.5+    930124 691  0.5+  0.5-    950201 691  2.2-  1.1-
891010 413 (3.9+  0.0 )   930124 691  0.4+  0.5-    950201 691  1.5-  1.1-

Ephemeris:
    P/1989 T2 (Helin-Roman-Alu 1)
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     m1
1995 02 02    13 27.51   +01 31.0    4.045    4.518   112.7    11.6    19.6
1995 02 12    13 27.91   +01 46.2    3.894    4.504   122.6    10.6    19.5
1995 02 22    13 26.86   +02 08.7    3.758    4.490   132.8     9.3    19.4
1995 03 04    13 24.38   +02 37.1    3.642    4.475   143.2     7.6    19.3
1995 03 14    13 20.60   +03 09.5    3.549    4.461   153.5     5.7    19.2
1995 03 24    13 15.79   +03 43.2    3.483    4.446   163.0     3.7    19.2
1995 04 03    13 10.28   +04 15.4    3.447    4.432   169.0     2.5    19.2
1995 04 13    13 04.49   +04 43.2    3.440    4.418   165.6     3.2    19.1
1995 04 23    12 58.88   +05 03.9    3.462    4.403   156.7     5.2    19.1
1995 05 03    12 53.88   +05 15.7    3.511    4.389   146.7     7.2    19.2
1995 05 13    12 49.83   +05 17.4    3.585    4.374   136.6     9.1    19.2
1995 05 23    12 46.99   +05 08.8    3.679    4.360   126.7    10.7    19.2
1995 06 02    12 45.50   +04 50.2    3.789    4.345   117.1    12.0    19.3
1995 06 12    12 45.41   +04 22.4    3.911    4.331   107.8    12.9    19.3
1995 06 22    12 46.70   +03 46.2    4.040    4.317    99.0    13.4    19.4
1995 07 02    12 49.30   +03 02.8    4.173    4.302    90.4    13.7    19.4
1995 07 12    12 53.12   +02 13.2    4.307    4.288    82.1    13.6    19.5
1995 07 22    12 58.04   +01 18.4    4.437    4.273    74.2    13.2    19.5
1995 08 01    13 03.96   +00 19.4    4.563    4.259    66.4    12.6    19.6
1995 08 11    13 10.77   -00 43.1    4.679    4.245    58.9    11.8    19.6
1995 08 21    13 18.36   -01 48.1    4.786    4.230    51.5    10.8    19.7
1995 08 31    13 26.65   -02 55.0    4.881    4.216    44.2     9.6    19.7
1995 09 10    13 35.55   -04 03.0    4.962    4.202    37.1     8.3    19.7
1995 09 20    13 44.98   -05 11.6    5.028    4.188    30.0     6.9    19.7

Brian G. Marsden                                              M.P.E.C. 1995-C11

    Read MPEC 1995-C10 Read MPEC 1995-C12

    MPEC number:

    Enter an MPEC number in one of the following forms:

    • 1997-B01 (the full form)
    • J97B01 (the packed version of the full form)
    • B01 (the abbreviated form)