PSR Discoveries

Ephemeris for Comet Hale-Bopp - April 1997 from Mauna Kea

(This table is wider than standard 8.5-inch paper.)

Apr UT ^* RA(1950) Dec(1950) RA (date) Dec (date) Mag Phase Solar Air- r Delta Track Rates
97 hr hh:mm:ss dd:mm:as hh:mm:ss dd:mm:as V Angle Elong mass [AU] [AU] RA Dec "/s
1 5:00n 01:46:20.00 +44:13:45.6 01:49:13.18 +44:27:49.7 -1.545 47.64 42.5 2.980 0.914 1.352 --- ---
1 6:00 01 46 42.70 +44 12 49.8 01 49 35.96 +44 26 53.2 -1.544 47.63 42.5 6.102 0.914 1.353 -0.0949 -0.0157
2 5:00n 01 55 18.43 +43 50 39.4 01 58 13.36 +44 04 26.1 -1.531 47.30 42.2 2.864 0.914 1.360 --- ---
2 6:00 01 55 40.56 +43 49 37.4 01 58 35.56 +44 03 23.3 -1.531 47.28 42.2 5.679 0.914 1.361 -0.0925 -0.0175
3 5:00n 02 04 2.91 +43 25 8.6 02 06 59.39 +43 38 37.1 -1.515 46.92 41.9 2.762 0.915 1.369 --- ---
3 6:00 02 04 24.44 +43 24 0.8 02 07 20.98 +43 37 28.5 -1.515 46.91 41.9 5.329 0.915 1.369 -0.0900 -0.0191
4 5:00n 02 12 32.78 +42 57 24.8 02 15 30.61 +43 10 34.5 -1.497 46.52 41.6 2.671 0.916 1.378 --- ---
4 6:00 02 12 53.69 +42 56 11.7 02 15 51.57 +43 09 20.6 -1.496 46.50 41.6 5.035 0.916 1.378 -0.0873 -0.0205
5 5:00n 02 20 47.55 +42 27 39.9 02 23 46.55 +42 40 30.3 -1.476 46.08 41.3 2.590 0.917 1.388 --- ---
5 6:00 02 21 7.82 +42 26 22.0 02 24 6.86 +42 39 11.6 -1.475 46.06 41.3 4.787 0.917 1.388 -0.0846 -0.0219
6 5:00n 02 28 46.91 +41 56 5.6 02 31 46.89 +42 08 36.4 -1.452 45.62 41.0 2.519 0.919 1.398 --- ---
6 6:00 02 29 6.53 +41 54 43.5 02 32 6.55 +42 07 13.4 -1.451 45.60 41.0 4.577 0.919 1.398 -0.0819 -0.0231
7 5:00n 02 36 30.70 +41 22 53.6 02 39 31.50 +41 35 4.5 -1.426 45.13 40.7 2.456 0.921 1.409 --- ---
7 6:00 02 36 49.67 +41 21 27.6 02 39 50.50 +41 33 37.7 -1.425 45.11 40.7 4.399 0.921 1.409 -0.0792 -0.0241
8 5:00c 02 43 58.92 +40 48 15.1 02 47 0.36 +41 00 6.0 -1.398 44.62 40.3 2.399 0.923 1.420 --- ---
8 6:00 02 44 17.24 +40 46 45.8 02 47 18.71 +40 58 35.8 -1.397 44.60 40.3 4.246 0.923 1.421 -0.0764 -0.0250
9 5:00c 02 51 11.65 +40 12 21.0 02 54 13.60 +40 23 51.8 -1.368 44.08 40.0 2.350 0.925 1.432 --- ---
9 6:00 02 51 29.33 +40 10 48.8 02 54 31.29 +40 22 18.8 -1.367 44.06 40.0 4.116 0.926 1.433 -0.0737 -0.0258
10 5:00c 02 58 9.11 +39 35 21.6 03 01 11.41 +39 46 32.4 -1.336 43.53 39.7 2.306 0.928 1.445 --- ---
10 6:00 02 58 26.15 +39 33 46.9 03 01 28.47 +39 44 56.9 -1.334 43.50 39.6 4.004 0.929 1.445 -0.0711 -0.0265
11 5:00c 03 04 51.58 +38 57 26.6 03 07 54.12 +39 08 17.6 -1.301 42.95 39.3 2.267 0.932 1.457 --- ---
11 6:00 03 05 8.01 +38 55 49.8 03 08 10.55 +39 06 40.0 -1.300 42.93 39.3 3.910 0.932 1.458 -0.0685 -0.0271
12 5:00c 03 11 19.43 +38 18 45.2 03 14 22.08 +38 29 16.6 -1.265 42.36 39.0 2.233 0.935 1.471 --- ---
12 6:00 03 11 35.26 +38 17 6.7 03 14 37.91 +38 27 37.3 -1.264 42.34 38.9 3.830 0.936 1.471 -0.0659 -0.0276
13 5:00c 03 17 33.08 +37 39 25.9 03 20 35.74 +37 49 37.9 -1.227 41.76 38.6 2.203 0.939 1.484 --- ---
13 6:00 03 17 48.32 +37 37 46.1 03 20 50.98 +37 47 57.3 -1.226 41.73 38.6 3.763 0.939 1.485 -0.0635 -0.0280
14 5:00c 03 23 32.97 +36 59 36.6 03 26 35.54 +37 09 29.5 -1.188 41.14 38.2 2.177 0.944 1.499 --- ---
14 6:00 03 23 47.65 +36 57 55.6 03 26 50.22 +37 07 47.7 -1.186 41.11 38.2 3.708 0.944 1.499 -0.0611 -0.0283
15 5:00c 03 29 19.60 +36 19 24.3 03 32 22.00 +36 28 58.4 -1.146 40.51 37.9 2.155 0.948 1.513 --- ---
15 6:00 03 29 33.73 +36 17 42.6 03 32 36.13 +36 27 15.9 -1.145 40.48 37.8 3.663 0.948 1.514 -0.0589 -0.0285
16 5:00c 03 34 53.47 +35 38 55.8 03 37 55.64 +35 48 11.5 -1.104 39.87 37.5 2.137 0.953 1.528 --- ---
16 6:00 03 35 7.09 +35 37 13.5 03 38 9.24 +35 46 28.4 -1.102 39.84 37.5 3.628 0.953 1.528 -0.0567 -0.0286
17 5:00c 03 40 15.11 +34 58 16.9 03 43 16.97 +35 07 14.5 -1.059 39.22 37.1 2.121 0.958 1.543 --- ---
17 6:00 03 40 28.23 +34 56 34.4 03 43 30.08 +35 05 31.2 -1.057 39.19 37.1 3.602 0.958 1.543 -0.0546 -0.0287
18 5:00c 03 45 25.04 +34 17 33.1 03 48 26.54 +34 26 13.0 -1.014 38.56 36.7 2.109 0.964 1.558 --- ---
18 6:00 03 45 37.68 +34 15 50.4 03 48 39.16 +34 24 29.6 -1.012 38.53 36.7 3.584 0.964 1.559 -0.0526 -0.0287
19 5:00c 03 50 23.78 +33 36 49.1 03 53 24.87 +33 45 11.7 -0.967 37.90 36.4 2.099 0.969 1.574 --- ---
19 6:00 03 50 35.97 +33 35 6.5 03 53 37.04 +33 43 28.5 -0.965 37.87 36.3 3.574 0.970 1.574 -0.0507 -0.0287
20 5:00c 03 55 11.85 +32 56 9.2 03 58 12.49 +33 04 14.9 -0.919 37.24 36.0 2.092 0.975 1.590 --- ---
20 6:00 03 55 23.60 +32 54 27.0 03 58 24.22 +33 02 32.0 -0.917 37.21 36.0 3.571 0.976 1.590 -0.0489 -0.0286
21 5:00c 03 59 49.76 +32 15 37.3 04 02 49.91 +32 23 26.5 -0.870 36.57 35.6 2.087 0.982 1.606 --- ---
21 6:00 04 00 1.10 +32 13 55.4 04 03 1.22 +32 21 44.0 -0.868 36.54 35.6 3.575 0.982 1.606 -0.0472 -0.0285
22 5:00c 04 04 18.00 +31 35 16.6 04 07 17.62 +31 42 49.7 -0.820 35.90 35.2 2.085 0.988 1.622 --- ---
22 6:00 04 04 28.94 +31 33 35.4 04 07 28.55 +31 41 7.8 -0.818 35.87 35.2 3.587 0.989 1.623 -0.0455 -0.0283
23 5:00c 04 08 37.04 +30 55 10.2 04 11 36.13 +31 02 27.5 -0.769 35.23 34.8 2.086 0.995 1.638 --- ---
23 6:00 04 08 47.62 +30 53 29.6 04 11 46.68 +31 00 46.3 -0.767 35.20 34.8 3.605 0.995 1.639 -0.0440 -0.0281
24 5:00c 04 12 47.36 +30 15 20.5 04 15 45.88 +30 22 22.5 -0.717 34.56 34.4 2.088 1.002 1.655 --- ---
24 6:00 04 12 57.58 +30 13 40.6 04 15 56.08 +30 20 42.1 -0.715 34.54 34.4 3.631 1.002 1.656 -0.0425 -0.0279
25 5:00c 04 16 49.40 +29 35 49.7 04 19 47.33 +29 42 36.8 -0.665 33.90 34.0 2.093 1.009 1.672 --- ---
25 6:00 04 16 59.28 +29 34 10.7 04 19 57.19 +29 40 57.2 -0.662 33.87 34.0 3.663 1.010 1.672 -0.0411 -0.0277
26 5:00c 04 20 43.58 +28 56 39.7 04 23 40.91 +29 03 12.2 -0.611 33.24 33.6 2.099 1.017 1.688 --- ---
26 6:00a 04 20 53.14 +28 55 1.7 04 23 50.46 +29 01 33.5 -0.609 33.21 33.6 3.702 1.017 1.689 -0.0398 -0.0274
27 5:00c 04 24 30.31 +28 17 52.1 04 27 27.04 +28 24 10.3 -0.558 32.58 33.2 2.108 1.025 1.705 --- ---
27 6:00a 04 24 39.57 +28 16 15.1 04 27 36.28 +28 22 32.7 -0.555 32.55 33.2 3.748 1.025 1.706 -0.0385 -0.0271
28 5:00c 04 28 9.98 +27 39 28.2 04 31 6.09 +27 45 32.5 -0.503 31.93 32.8 2.119 1.033 1.722 --- ---
28 6:00a 04 28 18.96 +27 37 52.2 04 31 15.05 +27 43 55.9 -0.501 31.90 32.8 3.802 1.033 1.723 -0.0373 -0.0268
29 5:00c 04 31 42.96 +27 01 29.0 04 34 38.46 +27 07 19.8 -0.448 31.28 32.5 2.132 1.041 1.739 --- ---
29 6:00a 04 31 51.68 +26 59 54.1 04 34 47.14 +27 05 44.3 -0.446 31.25 32.4 3.863 1.041 1.740 -0.0362 -0.0265
30 5:00c 04 35 9.61 +26 23 55.4 04 38 4.47 +26 29 33.0 -0.393 30.64 32.1 2.148 1.049 1.757 --- ---
30 6:00a 04 35 18.06 +26 22 21.6 04 38 12.90 +26 27 58.5 -0.391 30.61 32.0 3.933 1.050 1.757 -0.0351 -0.0262

^* KEY: UT = time in Greenwich England (=HST + 10 hours),
c = UT time is during local civil twilight (sun 0-6 degrees below horizon),
n = UT time is during local nautical twilight (sun 6-12 degrees below horizon),
a = UT time is during local astronomical twilight (sun 12-18 degrees below horizon).

Brightest on 1 Apr 1997 at V = -1.54 H = -1.82
Maximum phase angle of 47.64 on 1 Apr 1997
Mean opposition magnitude = -0.61
Slope = 3.900
Minimum phase angle of 30.59 on 30 Apr 1997
Osculating elements for Semi-major axis = -0.9141047
Ascending node = 281.77208
Eccentricity = 0.9950989
Perihelion = 130.59690
Epoch: 13 Mar 1997
Inclination = 89.42742
Mean anomaly = -0.00740
Source: MPC28557

Topocentric ephemeris for Mauna Kea Observatory Assumed sidereal tracking rate: 0.0000
Two-body ephemeris computations by David J. Tholen, Institute for Astronomy, Univ. of Hawaii (808-956-6930)

Return to Ephemeris Generators for Comet Hale-Bopp.

Go to 1997 Apparition of Comet Hale-Bopp in PSR Discoveries.

Apr	UT ^*	RA(1950)	Dec(1950)	RA (date)	Dec (date)	Mag	Phase	Solar	Air-	r	Delta	Track	Rates
97	hr	hh:mm:ss	dd:mm:as	hh:mm:ss	dd:mm:as	V	Angle	Elong	mass	[AU]	[AU]	RA	Dec "/s
1	5:00n	01:46:20.00	+44:13:45.6	01:49:13.18	+44:27:49.7	-1.545	47.64	42.5	2.980	0.914	1.352	---	---
1	6:00	01 46 42.70	+44 12 49.8	01 49 35.96	+44 26 53.2	-1.544	47.63	42.5	6.102	0.914	1.353	-0.0949	-0.0157
2	5:00n	01 55 18.43	+43 50 39.4	01 58 13.36	+44 04 26.1	-1.531	47.30	42.2	2.864	0.914	1.360	---	---
2	6:00	01 55 40.56	+43 49 37.4	01 58 35.56	+44 03 23.3	-1.531	47.28	42.2	5.679	0.914	1.361	-0.0925	-0.0175
3	5:00n	02 04 2.91	+43 25 8.6	02 06 59.39	+43 38 37.1	-1.515	46.92	41.9	2.762	0.915	1.369	---	---
3	6:00	02 04 24.44	+43 24 0.8	02 07 20.98	+43 37 28.5	-1.515	46.91	41.9	5.329	0.915	1.369	-0.0900	-0.0191
4	5:00n	02 12 32.78	+42 57 24.8	02 15 30.61	+43 10 34.5	-1.497	46.52	41.6	2.671	0.916	1.378	---	---
4	6:00	02 12 53.69	+42 56 11.7	02 15 51.57	+43 09 20.6	-1.496	46.50	41.6	5.035	0.916	1.378	-0.0873	-0.0205
5	5:00n	02 20 47.55	+42 27 39.9	02 23 46.55	+42 40 30.3	-1.476	46.08	41.3	2.590	0.917	1.388	---	---
5	6:00	02 21 7.82	+42 26 22.0	02 24 6.86	+42 39 11.6	-1.475	46.06	41.3	4.787	0.917	1.388	-0.0846	-0.0219
6	5:00n	02 28 46.91	+41 56 5.6	02 31 46.89	+42 08 36.4	-1.452	45.62	41.0	2.519	0.919	1.398	---	---
6	6:00	02 29 6.53	+41 54 43.5	02 32 6.55	+42 07 13.4	-1.451	45.60	41.0	4.577	0.919	1.398	-0.0819	-0.0231
7	5:00n	02 36 30.70	+41 22 53.6	02 39 31.50	+41 35 4.5	-1.426	45.13	40.7	2.456	0.921	1.409	---	---
7	6:00	02 36 49.67	+41 21 27.6	02 39 50.50	+41 33 37.7	-1.425	45.11	40.7	4.399	0.921	1.409	-0.0792	-0.0241
8	5:00c	02 43 58.92	+40 48 15.1	02 47 0.36	+41 00 6.0	-1.398	44.62	40.3	2.399	0.923	1.420	---	---
8	6:00	02 44 17.24	+40 46 45.8	02 47 18.71	+40 58 35.8	-1.397	44.60	40.3	4.246	0.923	1.421	-0.0764	-0.0250
9	5:00c	02 51 11.65	+40 12 21.0	02 54 13.60	+40 23 51.8	-1.368	44.08	40.0	2.350	0.925	1.432	---	---
9	6:00	02 51 29.33	+40 10 48.8	02 54 31.29	+40 22 18.8	-1.367	44.06	40.0	4.116	0.926	1.433	-0.0737	-0.0258
10	5:00c	02 58 9.11	+39 35 21.6	03 01 11.41	+39 46 32.4	-1.336	43.53	39.7	2.306	0.928	1.445	---	---
10	6:00	02 58 26.15	+39 33 46.9	03 01 28.47	+39 44 56.9	-1.334	43.50	39.6	4.004	0.929	1.445	-0.0711	-0.0265
11	5:00c	03 04 51.58	+38 57 26.6	03 07 54.12	+39 08 17.6	-1.301	42.95	39.3	2.267	0.932	1.457	---	---
11	6:00	03 05 8.01	+38 55 49.8	03 08 10.55	+39 06 40.0	-1.300	42.93	39.3	3.910	0.932	1.458	-0.0685	-0.0271
12	5:00c	03 11 19.43	+38 18 45.2	03 14 22.08	+38 29 16.6	-1.265	42.36	39.0	2.233	0.935	1.471	---	---
12	6:00	03 11 35.26	+38 17 6.7	03 14 37.91	+38 27 37.3	-1.264	42.34	38.9	3.830	0.936	1.471	-0.0659	-0.0276
13	5:00c	03 17 33.08	+37 39 25.9	03 20 35.74	+37 49 37.9	-1.227	41.76	38.6	2.203	0.939	1.484	---	---
13	6:00	03 17 48.32	+37 37 46.1	03 20 50.98	+37 47 57.3	-1.226	41.73	38.6	3.763	0.939	1.485	-0.0635	-0.0280
14	5:00c	03 23 32.97	+36 59 36.6	03 26 35.54	+37 09 29.5	-1.188	41.14	38.2	2.177	0.944	1.499	---	---
14	6:00	03 23 47.65	+36 57 55.6	03 26 50.22	+37 07 47.7	-1.186	41.11	38.2	3.708	0.944	1.499	-0.0611	-0.0283
15	5:00c	03 29 19.60	+36 19 24.3	03 32 22.00	+36 28 58.4	-1.146	40.51	37.9	2.155	0.948	1.513	---	---
15	6:00	03 29 33.73	+36 17 42.6	03 32 36.13	+36 27 15.9	-1.145	40.48	37.8	3.663	0.948	1.514	-0.0589	-0.0285
16	5:00c	03 34 53.47	+35 38 55.8	03 37 55.64	+35 48 11.5	-1.104	39.87	37.5	2.137	0.953	1.528	---	---
16	6:00	03 35 7.09	+35 37 13.5	03 38 9.24	+35 46 28.4	-1.102	39.84	37.5	3.628	0.953	1.528	-0.0567	-0.0286
17	5:00c	03 40 15.11	+34 58 16.9	03 43 16.97	+35 07 14.5	-1.059	39.22	37.1	2.121	0.958	1.543	---	---
17	6:00	03 40 28.23	+34 56 34.4	03 43 30.08	+35 05 31.2	-1.057	39.19	37.1	3.602	0.958	1.543	-0.0546	-0.0287
18	5:00c	03 45 25.04	+34 17 33.1	03 48 26.54	+34 26 13.0	-1.014	38.56	36.7	2.109	0.964	1.558	---	---
18	6:00	03 45 37.68	+34 15 50.4	03 48 39.16	+34 24 29.6	-1.012	38.53	36.7	3.584	0.964	1.559	-0.0526	-0.0287
19	5:00c	03 50 23.78	+33 36 49.1	03 53 24.87	+33 45 11.7	-0.967	37.90	36.4	2.099	0.969	1.574	---	---
19	6:00	03 50 35.97	+33 35 6.5	03 53 37.04	+33 43 28.5	-0.965	37.87	36.3	3.574	0.970	1.574	-0.0507	-0.0287
20	5:00c	03 55 11.85	+32 56 9.2	03 58 12.49	+33 04 14.9	-0.919	37.24	36.0	2.092	0.975	1.590	---	---
20	6:00	03 55 23.60	+32 54 27.0	03 58 24.22	+33 02 32.0	-0.917	37.21	36.0	3.571	0.976	1.590	-0.0489	-0.0286
21	5:00c	03 59 49.76	+32 15 37.3	04 02 49.91	+32 23 26.5	-0.870	36.57	35.6	2.087	0.982	1.606	---	---
21	6:00	04 00 1.10	+32 13 55.4	04 03 1.22	+32 21 44.0	-0.868	36.54	35.6	3.575	0.982	1.606	-0.0472	-0.0285
22	5:00c	04 04 18.00	+31 35 16.6	04 07 17.62	+31 42 49.7	-0.820	35.90	35.2	2.085	0.988	1.622	---	---
22	6:00	04 04 28.94	+31 33 35.4	04 07 28.55	+31 41 7.8	-0.818	35.87	35.2	3.587	0.989	1.623	-0.0455	-0.0283
23	5:00c	04 08 37.04	+30 55 10.2	04 11 36.13	+31 02 27.5	-0.769	35.23	34.8	2.086	0.995	1.638	---	---
23	6:00	04 08 47.62	+30 53 29.6	04 11 46.68	+31 00 46.3	-0.767	35.20	34.8	3.605	0.995	1.639	-0.0440	-0.0281
24	5:00c	04 12 47.36	+30 15 20.5	04 15 45.88	+30 22 22.5	-0.717	34.56	34.4	2.088	1.002	1.655	---	---
24	6:00	04 12 57.58	+30 13 40.6	04 15 56.08	+30 20 42.1	-0.715	34.54	34.4	3.631	1.002	1.656	-0.0425	-0.0279
25	5:00c	04 16 49.40	+29 35 49.7	04 19 47.33	+29 42 36.8	-0.665	33.90	34.0	2.093	1.009	1.672	---	---
25	6:00	04 16 59.28	+29 34 10.7	04 19 57.19	+29 40 57.2	-0.662	33.87	34.0	3.663	1.010	1.672	-0.0411	-0.0277
26	5:00c	04 20 43.58	+28 56 39.7	04 23 40.91	+29 03 12.2	-0.611	33.24	33.6	2.099	1.017	1.688	---	---
26	6:00a	04 20 53.14	+28 55 1.7	04 23 50.46	+29 01 33.5	-0.609	33.21	33.6	3.702	1.017	1.689	-0.0398	-0.0274
27	5:00c	04 24 30.31	+28 17 52.1	04 27 27.04	+28 24 10.3	-0.558	32.58	33.2	2.108	1.025	1.705	---	---
27	6:00a	04 24 39.57	+28 16 15.1	04 27 36.28	+28 22 32.7	-0.555	32.55	33.2	3.748	1.025	1.706	-0.0385	-0.0271
28	5:00c	04 28 9.98	+27 39 28.2	04 31 6.09	+27 45 32.5	-0.503	31.93	32.8	2.119	1.033	1.722	---	---
28	6:00a	04 28 18.96	+27 37 52.2	04 31 15.05	+27 43 55.9	-0.501	31.90	32.8	3.802	1.033	1.723	-0.0373	-0.0268
29	5:00c	04 31 42.96	+27 01 29.0	04 34 38.46	+27 07 19.8	-0.448	31.28	32.5	2.132	1.041	1.739	---	---
29	6:00a	04 31 51.68	+26 59 54.1	04 34 47.14	+27 05 44.3	-0.446	31.25	32.4	3.863	1.041	1.740	-0.0362	-0.0265
30	5:00c	04 35 9.61	+26 23 55.4	04 38 4.47	+26 29 33.0	-0.393	30.64	32.1	2.148	1.049	1.757	---	---
30	6:00a	04 35 18.06	+26 22 21.6	04 38 12.90	+26 27 58.5	-0.391	30.61	32.0	3.933	1.050	1.757	-0.0351	-0.0262