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) |
| 2026-07-29 00:00 |
00:51:58.26 |
+29:34:00.8 |
HIP 4197 |
21.97 |
| 2026-07-29 12:00 |
00:51:57.63 |
+29:34:05.7 |
HIP 4197 |
22.12 |
| 2026-07-30 00:00 |
00:51:56.99 |
+29:34:10.6 |
HIP 4197 |
22.28 |
| 2026-07-30 12:00 |
00:51:56.34 |
+29:34:15.3 |
HIP 4197 |
22.43 |
| 2026-07-31 00:00 |
00:51:55.67 |
+29:34:20.0 |
HIP 4197 |
22.59 |
| 2026-07-31 12:00 |
00:51:54.99 |
+29:34:24.5 |
HIP 4197 |
22.75 |
| 2026-08-01 00:00 |
00:51:54.30 |
+29:34:29.0 |
HIP 4197 |
22.91 |
| 2026-08-01 12:00 |
00:51:53.60 |
+29:34:33.3 |
HIP 4197 |
23.08 |
| 2026-08-02 00:00 |
00:51:52.88 |
+29:34:37.6 |
HIP 4197 |
23.25 |
| 2026-08-02 12:00 |
00:51:52.16 |
+29:34:41.8 |
HIP 4197 |
23.42 |
| 2026-08-03 00:00 |
00:51:51.42 |
+29:34:45.9 |
HIP 4197 |
23.59 |
| 2026-08-03 12:00 |
00:51:50.66 |
+29:34:49.9 |
HIP 4197 |
23.76 |
| 2026-08-04 00:00 |
00:51:49.90 |
+29:34:53.8 |
HIP 4197 |
23.94 |
| 2026-08-04 12:00 |
00:51:49.12 |
+29:34:57.6 |
HIP 4197 |
24.12 |
| 2026-08-05 00:00 |
00:51:48.33 |
+29:35:01.3 |
HIP 4197 |
24.30 |
| 2026-08-05 12:00 |
00:51:47.53 |
+29:35:04.9 |
HIP 4197 |
24.48 |
| 2026-08-06 00:00 |
00:51:46.72 |
+29:35:08.4 |
HIP 4197 |
24.67 |
| 2026-08-06 12:00 |
00:51:45.89 |
+29:35:11.8 |
HIP 4197 |
24.86 |
| 2026-08-07 00:00 |
00:51:45.06 |
+29:35:15.1 |
HIP 4197 |
25.04 |
| 2026-08-07 12:00 |
00:51:44.21 |
+29:35:18.4 |
HIP 4197 |
25.24 |
| 2026-08-08 00:00 |
00:51:43.35 |
+29:35:21.5 |
HIP 4197 |
25.43 |
| 2026-08-08 12:00 |
00:51:42.47 |
+29:35:24.5 |
HIP 4197 |
25.63 |
| 2026-08-09 00:00 |
00:51:41.59 |
+29:35:27.4 |
HIP 4197 |
25.83 |
| 2026-08-09 12:00 |
00:51:40.69 |
+29:35:30.2 |
HIP 4197 |
26.03 |
| 2026-08-10 00:00 |
00:51:39.79 |
+29:35:33.0 |
HIP 4197 |
26.23 |
| 2026-08-10 12:00 |
00:51:38.87 |
+29:35:35.6 |
HIP 4197 |
26.43 |
| 2026-08-11 00:00 |
00:51:37.93 |
+29:35:38.1 |
HIP 4197 |
26.64 |
| 2026-08-11 12:00 |
00:51:36.99 |
+29:35:40.5 |
HIP 4197 |
26.85 |
| 2026-08-12 00:00 |
00:51:36.04 |
+29:35:42.9 |
HIP 4197 |
27.06 |
| 2026-08-12 12:00 |
00:51:35.07 |
+29:35:45.1 |
HIP 4197 |
27.27 |
| 2026-08-13 00:00 |
00:51:34.09 |
+29:35:47.2 |
HIP 4197 |
27.49 |
| 2026-08-13 12:00 |
00:51:33.11 |
+29:35:49.2 |
HIP 4197 |
27.70 |
| 2026-08-14 00:00 |
00:51:32.11 |
+29:35:51.1 |
HIP 4197 |
27.92 |
| 2026-08-14 12:00 |
00:51:31.10 |
+29:35:52.9 |
HIP 4197 |
28.14 |
| 2026-08-15 00:00 |
00:51:30.07 |
+29:35:54.6 |
HIP 4197 |
28.37 |
| 2026-08-15 12:00 |
00:51:29.04 |
+29:35:56.2 |
HIP 3867 |
28.29 |
| 2026-08-16 00:00 |
00:51:28.00 |
+29:35:57.7 |
HIP 3867 |
28.11 |
| 2026-08-16 12:00 |
00:51:26.94 |
+29:35:59.1 |
HIP 3867 |
27.93 |
| 2026-08-17 00:00 |
00:51:25.88 |
+29:36:00.4 |
HIP 3867 |
27.75 |
| 2026-08-17 12:00 |
00:51:24.80 |
+29:36:01.6 |
HIP 3867 |
27.56 |
| 2026-08-18 00:00 |
00:51:23.72 |
+29:36:02.7 |
HIP 3867 |
27.38 |
| 2026-08-18 12:00 |
00:51:22.62 |
+29:36:03.7 |
HIP 3867 |
27.19 |
| 2026-08-19 00:00 |
00:51:21.51 |
+29:36:04.6 |
HIP 3867 |
27.00 |