메타데이터
| 항목 |
값 |
| Designation |
C/2000 A1 (Montani) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2000-07-13T05:54:09.682560Z |
| Orbit solution date (soln_date, UTC) |
2025-09-09T12:42:30Z |
| Obs used |
135 |
| NEO |
- |
| M1 |
4.400 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2000-07-31.0000000 |
| e |
1.00401459 |
| q (au) |
9.743100 |
| a (au) |
-2426.925294 |
| i (deg) |
24.541886 |
| Ω (om, deg) |
111.835138 |
| ω (w, deg) |
14.271337 |
| M (ma, deg) |
0.000146 |
밝기
산란 + 전체 선형
$$
M_a = (8.448 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.448 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.861 |
| 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 |
16:43:08.57 |
-05:18:16.6 |
HIP 81952 |
30.08 |
| 2026-07-29 12:00 |
16:43:07.19 |
-05:18:25.5 |
HIP 81952 |
30.19 |
| 2026-07-30 00:00 |
16:43:05.84 |
-05:18:34.5 |
HIP 81952 |
30.30 |
| 2026-07-30 12:00 |
16:43:04.51 |
-05:18:43.6 |
HIP 81952 |
30.41 |
| 2026-07-31 00:00 |
16:43:03.20 |
-05:18:52.8 |
HIP 81952 |
30.52 |
| 2026-07-31 12:00 |
16:43:01.90 |
-05:19:02.0 |
HIP 81952 |
30.63 |
| 2026-08-01 00:00 |
16:43:00.63 |
-05:19:11.4 |
HIP 81952 |
30.73 |
| 2026-08-01 12:00 |
16:42:59.38 |
-05:19:20.8 |
HIP 81952 |
30.84 |
| 2026-08-02 00:00 |
16:42:58.14 |
-05:19:30.3 |
HIP 81952 |
30.95 |
| 2026-08-02 12:00 |
16:42:56.93 |
-05:19:40.0 |
HIP 81952 |
31.05 |
| 2026-08-03 00:00 |
16:42:55.74 |
-05:19:49.7 |
HIP 81952 |
31.15 |
| 2026-08-03 12:00 |
16:42:54.57 |
-05:19:59.5 |
HIP 81952 |
31.25 |
| 2026-08-04 00:00 |
16:42:53.42 |
-05:20:09.4 |
HIP 81952 |
31.35 |
| 2026-08-04 12:00 |
16:42:52.29 |
-05:20:19.4 |
HIP 81952 |
31.45 |
| 2026-08-05 00:00 |
16:42:51.18 |
-05:20:29.4 |
HIP 81952 |
31.55 |
| 2026-08-05 12:00 |
16:42:50.09 |
-05:20:39.6 |
HIP 81952 |
31.64 |
| 2026-08-06 00:00 |
16:42:49.02 |
-05:20:49.8 |
HIP 81952 |
31.73 |
| 2026-08-06 12:00 |
16:42:47.98 |
-05:21:00.2 |
HIP 81952 |
31.82 |
| 2026-08-07 00:00 |
16:42:46.95 |
-05:21:10.6 |
HIP 81952 |
31.91 |
| 2026-08-07 12:00 |
16:42:45.95 |
-05:21:21.1 |
HIP 81952 |
32.00 |
| 2026-08-08 00:00 |
16:42:44.97 |
-05:21:31.7 |
HIP 81952 |
32.08 |
| 2026-08-08 12:00 |
16:42:44.01 |
-05:21:42.3 |
HIP 81952 |
32.16 |
| 2026-08-09 00:00 |
16:42:43.07 |
-05:21:53.1 |
HIP 81952 |
32.24 |
| 2026-08-09 12:00 |
16:42:42.16 |
-05:22:03.9 |
HIP 81952 |
32.31 |
| 2026-08-10 00:00 |
16:42:41.26 |
-05:22:14.8 |
HIP 81952 |
32.38 |
| 2026-08-10 12:00 |
16:42:40.39 |
-05:22:25.8 |
HIP 81952 |
32.45 |
| 2026-08-11 00:00 |
16:42:39.54 |
-05:22:36.9 |
HIP 81952 |
32.52 |
| 2026-08-11 12:00 |
16:42:38.71 |
-05:22:48.0 |
HIP 81952 |
32.58 |
| 2026-08-12 00:00 |
16:42:37.90 |
-05:22:59.3 |
HIP 81952 |
32.65 |
| 2026-08-12 12:00 |
16:42:37.12 |
-05:23:10.6 |
HIP 81952 |
32.70 |
| 2026-08-13 00:00 |
16:42:36.36 |
-05:23:22.0 |
HIP 81952 |
32.76 |
| 2026-08-13 12:00 |
16:42:35.62 |
-05:23:33.4 |
HIP 81952 |
32.81 |
| 2026-08-14 00:00 |
16:42:34.90 |
-05:23:45.0 |
HIP 81952 |
32.86 |
| 2026-08-14 12:00 |
16:42:34.21 |
-05:23:56.6 |
HIP 81952 |
32.90 |
| 2026-08-15 00:00 |
16:42:33.54 |
-05:24:08.3 |
HIP 81952 |
32.94 |
| 2026-08-15 12:00 |
16:42:32.89 |
-05:24:20.0 |
HIP 81952 |
32.98 |
| 2026-08-16 00:00 |
16:42:32.26 |
-05:24:31.9 |
HIP 81952 |
33.01 |
| 2026-08-16 12:00 |
16:42:31.66 |
-05:24:43.8 |
HIP 81952 |
33.04 |
| 2026-08-17 00:00 |
16:42:31.08 |
-05:24:55.8 |
HIP 81952 |
33.07 |
| 2026-08-17 12:00 |
16:42:30.52 |
-05:25:07.8 |
HIP 81952 |
33.09 |
| 2026-08-18 00:00 |
16:42:29.99 |
-05:25:19.9 |
HIP 81952 |
33.11 |
| 2026-08-18 12:00 |
16:42:29.48 |
-05:25:32.1 |
HIP 81952 |
33.12 |
| 2026-08-19 00:00 |
16:42:28.99 |
-05:25:44.4 |
HIP 81952 |
33.13 |