Circular No. 6887

Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION

Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.

IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions) BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)

          URL http://cfa-www.harvard.edu/iau/cbat.html

Phone 617-495-7244/7440/7444 (for emergency use only)

COMET C/1998 H1 (STONEHOUSE)

The following parabolic orbital elements, based on 57 observations made at 10 observatories during Apr. 26-27, are from MPEC 1998-H29:

T = 1998 Apr. 14.205 TT  ω = 1.^{o}146
Ω = 222.103 }2000.0
q = 1.48678 AU  i = 104.668
1998TT α_{2000} δ_{2000} Δ r ϵ β m_{1}
Apr. 27 15^{h}25.^{m}63 +12^{o}42.^{′}9 0.544 1.498 148.^{o}6 20.^{o}5 10.4
28 15 18.99 +15 15.9 0.550 1.499 147.4 21.2 10.5
29 15 12.34 +17 43.8 0.558 1.501 145.8 22.1 10.5
30 15 05.69 +20 05.8 0.567 1.503 144.1 23.2 10.5
May 1 14 59.06 +22 21.4 0.577 1.505 142.1 24.3 10.6
2 14 52.47 +24 30.0 0.589 1.508 140.0 25.4 10.6
3 14 45.95 +26 31.5 0.603 1.510 137.9 26.6 10.7
4 14 39.50 +28 25.6 0.617 1.513 135.7 27.7 10.7
5 14 33.14 +30 12.4 0.633 1.515 133.5 28.9 10.8
6 14 26.88 +31 52.1 0.649 1.518 131.3 29.9 10.9
7 14 20.75 +33 24.7 0.667 1.521 129.2 30.9 10.9
8 14 14.75 +34 50.6 0.685 1.524 127.1 31.9 11.0
9 14 08.89 +36 10.1 0.704 1.527 125.1 32.8 11.1
10 14 03.18 +37 23.6 0.724 1.530 123.1 33.6 11.1
11 13 57.63 +38 31.3 0.745 1.534 121.1 34.3 11.2
12 13 52.25 +39 33.7 0.766 1.537 119.3 35.0 11.3
13 13 47.03 +40 31.1 0.787 1.541 117.5 35.6 11.4
14 13 41.99 +41 23.9 0.810 1.545 115.7 36.1 11.4
15 13 37.12 +42 12.4 0.832 1.549 114.0 36.6 11.5
16 13 32.43 +42 56.9 0.855 1.552 112.4 37.0 11.6
17 13 27.92 +43 37.8 0.878 1.557 110.8 37.4 11.6
19 13 19.42 +44 49.7 0.925 1.565 107.7 38.0 11.8
21 13 11.60 +45 50.2 0.973 1.574 104.9 38.4 11.9
23 13 04.46 +46 41.0 1.022 1.583 102.2 38.7 12.0
25 12 57.95 +47 23.6 1.071 1.593  99.7 38.8 12.2
27 12 52.05 +47 59.5 1.121 1.603  97.3 38.8 12.3
29 12 46.71 +48 29.5 1.170 1.614  95.0 38.7 12.4
31 12 41.92 +48 54.8 1.220 1.625  92.8 38.6 12.5
June 2 12 37.61 +49 15.9 1.270 1.636  90.8 38.3 12.7
4 12 33.77 +49 33.6 1.320 1.648  88.8 38.0 12.8
6 12 30.36 +49 48.4 1.369 1.660  86.9 37.6 12.9
1998 April 27  \begin{matrix}c \\ ◯ \end{matrix} Copyright 1998 CBAT  Brian G. Marsden