메타데이터
| 항목 |
값 |
| Designation |
C/1973 A1 (Heck-Sause) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1972-10-05T11:17:13.539840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:22Z |
| Obs used |
190 |
| NEO |
- |
| M1 |
5.500 |
| K1 |
10.250 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1973-03-02.0000000 |
| e |
1.00057319 |
| q (au) |
2.511110 |
| a (au) |
-4380.958906 |
| i (deg) |
138.630150 |
| Ω (om, deg) |
175.878043 |
| ω (w, deg) |
346.237180 |
| M (ma, deg) |
0.000501 |
밝기
산란 + 전체 선형
$$
M_a = (2.285 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
2.285 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
10.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
00:49:52.97 |
+29:33:22.4 |
HIP 3867 |
12.95 |
| 2026-09-20 12:00 |
00:49:51.38 |
+29:33:16.5 |
HIP 3867 |
12.78 |
| 2026-09-21 00:00 |
00:49:49.79 |
+29:33:10.5 |
HIP 3867 |
12.62 |
| 2026-09-21 12:00 |
00:49:48.19 |
+29:33:04.4 |
HIP 3867 |
12.46 |
| 2026-09-22 00:00 |
00:49:46.59 |
+29:32:58.2 |
HIP 3867 |
12.31 |
| 2026-09-22 12:00 |
00:49:44.98 |
+29:32:51.9 |
HIP 3867 |
12.17 |
| 2026-09-23 00:00 |
00:49:43.37 |
+29:32:45.5 |
HIP 3867 |
12.03 |
| 2026-09-23 12:00 |
00:49:41.76 |
+29:32:39.1 |
HIP 3867 |
11.90 |
| 2026-09-24 00:00 |
00:49:40.15 |
+29:32:32.5 |
HIP 3867 |
11.78 |
| 2026-09-24 12:00 |
00:49:38.53 |
+29:32:25.8 |
HIP 3867 |
11.67 |
| 2026-09-25 00:00 |
00:49:36.91 |
+29:32:19.0 |
HIP 3867 |
11.57 |
| 2026-09-25 12:00 |
00:49:35.29 |
+29:32:12.2 |
HIP 3867 |
11.48 |
| 2026-09-26 00:00 |
00:49:33.66 |
+29:32:05.2 |
HIP 3867 |
11.39 |
| 2026-09-26 12:00 |
00:49:32.03 |
+29:31:58.2 |
HIP 3867 |
11.32 |
| 2026-09-27 00:00 |
00:49:30.40 |
+29:31:51.0 |
HIP 3867 |
11.26 |
| 2026-09-27 12:00 |
00:49:28.77 |
+29:31:43.8 |
HIP 3867 |
11.21 |
| 2026-09-28 00:00 |
00:49:27.13 |
+29:31:36.5 |
HIP 3867 |
11.17 |
| 2026-09-28 12:00 |
00:49:25.49 |
+29:31:29.0 |
HIP 3867 |
11.14 |
| 2026-09-29 00:00 |
00:49:23.85 |
+29:31:21.5 |
HIP 3867 |
11.12 |
| 2026-09-29 12:00 |
00:49:22.21 |
+29:31:13.9 |
HIP 3867 |
11.12 |
| 2026-09-30 00:00 |
00:49:20.57 |
+29:31:06.2 |
HIP 3867 |
11.12 |
| 2026-09-30 12:00 |
00:49:18.92 |
+29:30:58.5 |
HIP 3867 |
11.14 |
| 2026-10-01 00:00 |
00:49:17.27 |
+29:30:50.6 |
HIP 3867 |
11.17 |
| 2026-10-01 12:00 |
00:49:15.62 |
+29:30:42.6 |
HIP 3867 |
11.21 |
| 2026-10-02 00:00 |
00:49:13.97 |
+29:30:34.6 |
HIP 3867 |
11.26 |
| 2026-10-02 12:00 |
00:49:12.32 |
+29:30:26.4 |
HIP 3867 |
11.33 |
| 2026-10-03 00:00 |
00:49:10.67 |
+29:30:18.2 |
HIP 3867 |
11.40 |
| 2026-10-03 12:00 |
00:49:09.02 |
+29:30:09.9 |
HIP 3867 |
11.49 |
| 2026-10-04 00:00 |
00:49:07.36 |
+29:30:01.5 |
HIP 3867 |
11.59 |
| 2026-10-04 12:00 |
00:49:05.71 |
+29:29:53.0 |
HIP 3867 |
11.70 |
| 2026-10-05 00:00 |
00:49:04.05 |
+29:29:44.4 |
HIP 3867 |
11.82 |
| 2026-10-05 12:00 |
00:49:02.40 |
+29:29:35.7 |
HIP 3867 |
11.95 |
| 2026-10-06 00:00 |
00:49:00.74 |
+29:29:27.0 |
HIP 3867 |
12.09 |
| 2026-10-06 12:00 |
00:48:59.08 |
+29:29:18.1 |
HIP 3867 |
12.24 |
| 2026-10-07 00:00 |
00:48:57.43 |
+29:29:09.2 |
HIP 3867 |
12.40 |
| 2026-10-07 12:00 |
00:48:55.77 |
+29:29:00.2 |
HIP 3867 |
12.57 |
| 2026-10-08 00:00 |
00:48:54.11 |
+29:28:51.1 |
HIP 3867 |
12.75 |
| 2026-10-08 12:00 |
00:48:52.46 |
+29:28:42.0 |
HIP 3867 |
12.93 |
| 2026-10-09 00:00 |
00:48:50.80 |
+29:28:32.7 |
HIP 3867 |
13.13 |
| 2026-10-09 12:00 |
00:48:49.15 |
+29:28:23.4 |
HIP 3867 |
13.33 |
| 2026-10-10 00:00 |
00:48:47.49 |
+29:28:14.0 |
HIP 3867 |
13.54 |
| 2026-10-10 12:00 |
00:48:45.84 |
+29:28:04.5 |
HIP 3867 |
13.76 |
| 2026-10-11 00:00 |
00:48:44.19 |
+29:27:54.9 |
HIP 3867 |
13.98 |