메타데이터
| 항목 |
값 |
| Designation |
C/1979 S1 (Meier) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1979-10-17T08:06:07.672320Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:27Z |
| Obs used |
45 |
| NEO |
- |
| M1 |
4.800 |
| K1 |
46.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1979-11-02.0000000 |
| e |
0.97299836 |
| q (au) |
1.431958 |
| a (au) |
53.032267 |
| i (deg) |
67.079393 |
| Ω (om, deg) |
297.631300 |
| ω (w, deg) |
112.564818 |
| M (ma, deg) |
0.039972 |
밝기
산란 + 전체 선형
$$
M_a = (8.190 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.190 |
| 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 |
11:14:05.45 |
-74:36:54.6 |
HIP 54653 |
14.54 |
| 2026-07-29 12:00 |
11:14:10.62 |
-74:36:37.9 |
HIP 54653 |
14.65 |
| 2026-07-30 00:00 |
11:14:15.84 |
-74:36:21.5 |
HIP 54653 |
14.77 |
| 2026-07-30 12:00 |
11:14:21.08 |
-74:36:05.2 |
HIP 54653 |
14.90 |
| 2026-07-31 00:00 |
11:14:26.36 |
-74:35:49.1 |
HIP 54653 |
15.05 |
| 2026-07-31 12:00 |
11:14:31.67 |
-74:35:33.2 |
HIP 54653 |
15.22 |
| 2026-08-01 00:00 |
11:14:37.02 |
-74:35:17.5 |
HIP 54653 |
15.40 |
| 2026-08-01 12:00 |
11:14:42.39 |
-74:35:01.9 |
HIP 54653 |
15.59 |
| 2026-08-02 00:00 |
11:14:47.80 |
-74:34:46.6 |
HIP 54653 |
15.80 |
| 2026-08-02 12:00 |
11:14:53.24 |
-74:34:31.5 |
HIP 54653 |
16.02 |
| 2026-08-03 00:00 |
11:14:58.71 |
-74:34:16.5 |
HIP 54653 |
16.26 |
| 2026-08-03 12:00 |
11:15:04.21 |
-74:34:01.7 |
HIP 54653 |
16.50 |
| 2026-08-04 00:00 |
11:15:09.74 |
-74:33:47.2 |
HIP 54653 |
16.76 |
| 2026-08-04 12:00 |
11:15:15.30 |
-74:33:32.8 |
HIP 54653 |
17.02 |
| 2026-08-05 00:00 |
11:15:20.89 |
-74:33:18.7 |
HIP 54653 |
17.30 |
| 2026-08-05 12:00 |
11:15:26.51 |
-74:33:04.7 |
HIP 54653 |
17.59 |
| 2026-08-06 00:00 |
11:15:32.16 |
-74:32:50.9 |
HIP 54653 |
17.88 |
| 2026-08-06 12:00 |
11:15:37.84 |
-74:32:37.4 |
HIP 54653 |
18.19 |
| 2026-08-07 00:00 |
11:15:43.54 |
-74:32:24.0 |
HIP 54653 |
18.50 |
| 2026-08-07 12:00 |
11:15:49.28 |
-74:32:10.8 |
HIP 54653 |
18.82 |
| 2026-08-08 00:00 |
11:15:55.04 |
-74:31:57.9 |
HIP 54653 |
19.15 |
| 2026-08-08 12:00 |
11:16:00.83 |
-74:31:45.1 |
HIP 54653 |
19.49 |
| 2026-08-09 00:00 |
11:16:06.65 |
-74:31:32.6 |
HIP 54653 |
19.83 |
| 2026-08-09 12:00 |
11:16:12.50 |
-74:31:20.2 |
HIP 54653 |
20.18 |
| 2026-08-10 00:00 |
11:16:18.37 |
-74:31:08.1 |
HIP 54653 |
20.54 |
| 2026-08-10 12:00 |
11:16:24.26 |
-74:30:56.2 |
HIP 54653 |
20.90 |
| 2026-08-11 00:00 |
11:16:30.19 |
-74:30:44.5 |
HIP 55237 |
21.24 |
| 2026-08-11 12:00 |
11:16:36.13 |
-74:30:33.0 |
HIP 55237 |
20.90 |
| 2026-08-12 00:00 |
11:16:42.11 |
-74:30:21.7 |
HIP 55237 |
20.57 |
| 2026-08-12 12:00 |
11:16:48.11 |
-74:30:10.6 |
HIP 55237 |
20.24 |
| 2026-08-13 00:00 |
11:16:54.13 |
-74:29:59.7 |
HIP 55237 |
19.93 |
| 2026-08-13 12:00 |
11:17:00.17 |
-74:29:49.1 |
HIP 55237 |
19.62 |
| 2026-08-14 00:00 |
11:17:06.24 |
-74:29:38.6 |
HIP 55237 |
19.31 |
| 2026-08-14 12:00 |
11:17:12.33 |
-74:29:28.4 |
HIP 55237 |
19.02 |
| 2026-08-15 00:00 |
11:17:18.45 |
-74:29:18.4 |
HIP 55237 |
18.73 |
| 2026-08-15 12:00 |
11:17:24.58 |
-74:29:08.6 |
HIP 55237 |
18.46 |
| 2026-08-16 00:00 |
11:17:30.74 |
-74:28:59.0 |
HIP 55237 |
18.19 |
| 2026-08-16 12:00 |
11:17:36.92 |
-74:28:49.7 |
HIP 55237 |
17.93 |
| 2026-08-17 00:00 |
11:17:43.12 |
-74:28:40.5 |
HIP 55237 |
17.69 |
| 2026-08-17 12:00 |
11:17:49.34 |
-74:28:31.6 |
HIP 55237 |
17.45 |
| 2026-08-18 00:00 |
11:17:55.59 |
-74:28:22.9 |
HIP 55237 |
17.23 |
| 2026-08-18 12:00 |
11:18:01.85 |
-74:28:14.4 |
HIP 55237 |
17.02 |
| 2026-08-19 00:00 |
11:18:08.13 |
-74:28:06.1 |
HIP 55237 |
16.82 |