메타데이터
| 항목 |
값 |
| Designation |
120P/Mueller 1 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2004-09-29T10:29:13.793280Z |
| Orbit solution date (soln_date, UTC) |
2022-02-14T01:12:50Z |
| Obs used |
147 |
| NEO |
- |
| M1 |
6.600 |
| K1 |
26.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2007-09-06.0000000 |
| e |
0.33653878 |
| q (au) |
2.743863 |
| a (au) |
4.135679 |
| i (deg) |
8.791195 |
| Ω (om, deg) |
4.442767 |
| ω (w, deg) |
30.008025 |
| M (ma, deg) |
125.574538 |
밝기
산란 + 전체 선형
$$
M_a = (11.540 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.540 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.503 |
| 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 |
15:38:14.23 |
-27:04:09.6 |
HIP 76611 |
15.15 |
| 2026-09-20 12:00 |
15:38:34.82 |
-27:04:45.8 |
HIP 76673 |
12.38 |
| 2026-09-21 00:00 |
15:38:55.55 |
-27:05:22.6 |
HIP 76673 |
8.13 |
| 2026-09-21 12:00 |
15:39:16.40 |
-27:05:59.7 |
HIP 76673 |
4.72 |
| 2026-09-22 00:00 |
15:39:37.40 |
-27:06:37.4 |
HIP 76673 |
4.72 |
| 2026-09-22 12:00 |
15:39:58.52 |
-27:07:15.5 |
HIP 76673 |
8.20 |
| 2026-09-23 00:00 |
15:40:19.77 |
-27:07:54.0 |
HIP 76673 |
12.56 |
| 2026-09-23 12:00 |
15:40:41.16 |
-27:08:33.0 |
HIP 76673 |
17.16 |
| 2026-09-24 00:00 |
15:41:02.67 |
-27:09:12.4 |
HIP 76673 |
21.88 |
| 2026-09-24 12:00 |
15:41:24.31 |
-27:09:52.2 |
HIP 76702 |
25.92 |
| 2026-09-25 00:00 |
15:41:46.08 |
-27:10:32.5 |
HIP 76702 |
29.95 |
| 2026-09-25 12:00 |
15:42:07.97 |
-27:11:13.2 |
HIP 77087 |
34.06 |
| 2026-09-26 00:00 |
15:42:29.99 |
-27:11:54.3 |
HIP 77087 |
29.48 |
| 2026-09-26 12:00 |
15:42:52.14 |
-27:12:35.8 |
HIP 77087 |
25.01 |
| 2026-09-27 00:00 |
15:43:14.41 |
-27:13:17.8 |
HIP 77087 |
20.75 |
| 2026-09-27 12:00 |
15:43:36.81 |
-27:14:00.1 |
HIP 77087 |
16.86 |
| 2026-09-28 00:00 |
15:43:59.32 |
-27:14:42.8 |
HIP 77087 |
13.72 |
| 2026-09-28 12:00 |
15:44:21.96 |
-27:15:25.9 |
HIP 77087 |
11.96 |
| 2026-09-29 00:00 |
15:44:44.72 |
-27:16:09.4 |
HIP 77087 |
12.23 |
| 2026-09-29 12:00 |
15:45:07.61 |
-27:16:53.3 |
HIP 77087 |
14.45 |
| 2026-09-30 00:00 |
15:45:30.61 |
-27:17:37.6 |
HIP 77087 |
17.92 |
| 2026-09-30 12:00 |
15:45:53.73 |
-27:18:22.2 |
HIP 77087 |
22.08 |
| 2026-10-01 00:00 |
15:46:16.98 |
-27:19:07.2 |
HIP 77339 |
19.79 |
| 2026-10-01 12:00 |
15:46:40.34 |
-27:19:52.6 |
HIP 77339 |
17.14 |
| 2026-10-02 00:00 |
15:47:03.82 |
-27:20:38.3 |
HIP 77339 |
15.84 |
| 2026-10-02 12:00 |
15:47:27.41 |
-27:21:24.4 |
HIP 77339 |
16.25 |
| 2026-10-03 00:00 |
15:47:51.13 |
-27:22:10.8 |
HIP 77449 |
17.16 |
| 2026-10-03 12:00 |
15:48:14.96 |
-27:22:57.6 |
HIP 77449 |
13.49 |
| 2026-10-04 00:00 |
15:48:38.90 |
-27:23:44.7 |
HIP 77449 |
11.23 |
| 2026-10-04 12:00 |
15:49:02.96 |
-27:24:32.1 |
HIP 77449 |
11.31 |
| 2026-10-05 00:00 |
15:49:27.14 |
-27:25:19.9 |
HIP 77449 |
13.73 |
| 2026-10-05 12:00 |
15:49:51.42 |
-27:26:08.0 |
HIP 77449 |
17.56 |
| 2026-10-06 00:00 |
15:50:15.82 |
-27:26:56.4 |
HIP 77449 |
22.10 |
| 2026-10-06 12:00 |
15:50:40.34 |
-27:27:45.2 |
HIP 77449 |
27.01 |
| 2026-10-07 00:00 |
15:51:04.96 |
-27:28:34.2 |
HIP 77531 |
29.29 |
| 2026-10-07 12:00 |
15:51:29.70 |
-27:29:23.6 |
HIP 77821 |
28.88 |
| 2026-10-08 00:00 |
15:51:54.54 |
-27:30:13.2 |
HIP 77821 |
23.58 |
| 2026-10-08 12:00 |
15:52:19.49 |
-27:31:03.2 |
HIP 77821 |
18.42 |
| 2026-10-09 00:00 |
15:52:44.56 |
-27:31:53.4 |
HIP 77821 |
13.58 |
| 2026-10-09 12:00 |
15:53:09.72 |
-27:32:43.9 |
HIP 77821 |
9.61 |
| 2026-10-10 00:00 |
15:53:35.00 |
-27:33:34.7 |
HIP 77821 |
8.00 |
| 2026-10-10 12:00 |
15:54:00.38 |
-27:34:25.8 |
HIP 77821 |
9.99 |
| 2026-10-11 00:00 |
15:54:25.87 |
-27:35:17.1 |
HIP 77821 |
14.18 |