메타데이터
| 항목 |
값 |
| Designation |
372P/McNaught |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2009-04-21T12:58:57.285120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:37Z |
| Obs used |
438 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
15.500 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2018-08-08T11:54:29.952000Z |
| Discovery magnitude (MPC) |
22.40 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2009-04-15.0000000 |
| e |
0.15350456 |
| q (au) |
3.803759 |
| a (au) |
4.493537 |
| i (deg) |
9.518532 |
| Ω (om, deg) |
325.860084 |
| ω (w, deg) |
27.455141 |
| M (ma, deg) |
359.323198 |
밝기
산란 + 전체 선형
$$
M_a = (15.453 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.453 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.504 |
| 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) |
| 2026-03-26 00:00 |
17:50:32.91 |
-32:52:38.1 |
HIP 87361 |
9.26 |
| 2026-03-26 12:00 |
17:50:44.63 |
-32:53:31.0 |
HIP 87361 |
7.03 |
| 2026-03-27 00:00 |
17:50:56.12 |
-32:54:23.9 |
HIP 87361 |
5.19 |
| 2026-03-27 12:00 |
17:51:07.37 |
-32:55:16.8 |
HIP 87361 |
4.18 |
| 2026-03-28 00:00 |
17:51:18.40 |
-32:56:09.7 |
HIP 87361 |
4.52 |
| 2026-03-28 12:00 |
17:51:29.19 |
-32:57:02.7 |
HIP 87361 |
5.92 |
| 2026-03-29 00:00 |
17:51:39.75 |
-32:57:55.5 |
HIP 87361 |
7.79 |
| 2026-03-29 12:00 |
17:51:50.07 |
-32:58:48.4 |
HIP 87361 |
9.84 |
| 2026-03-30 00:00 |
17:52:00.15 |
-32:59:41.3 |
HIP 87361 |
11.94 |
| 2026-03-30 12:00 |
17:52:10.00 |
-33:00:34.2 |
HIP 87361 |
14.05 |
| 2026-03-31 00:00 |
17:52:19.61 |
-33:01:27.1 |
HIP 87361 |
16.15 |
| 2026-03-31 12:00 |
17:52:28.98 |
-33:02:19.9 |
HIP 87361 |
18.22 |
| 2026-04-01 00:00 |
17:52:38.11 |
-33:03:12.8 |
HIP 87361 |
20.26 |
| 2026-04-01 12:00 |
17:52:47.00 |
-33:04:05.6 |
HIP 87361 |
22.26 |
| 2026-04-02 00:00 |
17:52:55.65 |
-33:04:58.5 |
HIP 87361 |
24.22 |
| 2026-04-02 12:00 |
17:53:04.05 |
-33:05:51.3 |
HIP 87361 |
26.14 |
| 2026-04-03 00:00 |
17:53:12.21 |
-33:06:44.0 |
HIP 87361 |
28.01 |
| 2026-04-03 12:00 |
17:53:20.13 |
-33:07:36.8 |
HIP 87361 |
29.85 |
| 2026-04-04 00:00 |
17:53:27.80 |
-33:08:29.5 |
HIP 87664 |
30.94 |
| 2026-04-04 12:00 |
17:53:35.22 |
-33:09:22.2 |
HIP 87664 |
29.55 |
| 2026-04-05 00:00 |
17:53:42.39 |
-33:10:14.9 |
HIP 87664 |
28.23 |
| 2026-04-05 12:00 |
17:53:49.31 |
-33:11:07.6 |
HIP 87664 |
26.98 |
| 2026-04-06 00:00 |
17:53:55.98 |
-33:12:00.2 |
HIP 87664 |
25.78 |
| 2026-04-06 12:00 |
17:54:02.41 |
-33:12:52.7 |
HIP 87664 |
24.65 |
| 2026-04-07 00:00 |
17:54:08.58 |
-33:13:45.3 |
HIP 87664 |
23.57 |
| 2026-04-07 12:00 |
17:54:14.49 |
-33:14:37.7 |
HIP 87664 |
22.56 |
| 2026-04-08 00:00 |
17:54:20.15 |
-33:15:30.2 |
HIP 87664 |
21.62 |
| 2026-04-08 12:00 |
17:54:25.56 |
-33:16:22.5 |
HIP 87664 |
20.73 |
| 2026-04-09 00:00 |
17:54:30.71 |
-33:17:14.9 |
HIP 87664 |
19.90 |
| 2026-04-09 12:00 |
17:54:35.60 |
-33:18:07.1 |
HIP 87664 |
19.13 |
| 2026-04-10 00:00 |
17:54:40.24 |
-33:18:59.3 |
HIP 87664 |
18.42 |
| 2026-04-10 12:00 |
17:54:44.61 |
-33:19:51.4 |
HIP 87664 |
17.77 |
| 2026-04-11 00:00 |
17:54:48.73 |
-33:20:43.5 |
HIP 87664 |
17.16 |
| 2026-04-11 12:00 |
17:54:52.58 |
-33:21:35.5 |
HIP 87664 |
16.61 |
| 2026-04-12 00:00 |
17:54:56.18 |
-33:22:27.4 |
HIP 87664 |
16.10 |
| 2026-04-12 12:00 |
17:54:59.51 |
-33:23:19.2 |
HIP 87664 |
15.63 |
| 2026-04-13 00:00 |
17:55:02.58 |
-33:24:10.9 |
HIP 87664 |
15.20 |
| 2026-04-13 12:00 |
17:55:05.38 |
-33:25:02.5 |
HIP 87664 |
14.81 |
| 2026-04-14 00:00 |
17:55:07.93 |
-33:25:54.0 |
HIP 87664 |
14.45 |
| 2026-04-14 12:00 |
17:55:10.20 |
-33:26:45.4 |
HIP 87664 |
14.11 |
| 2026-04-15 00:00 |
17:55:12.21 |
-33:27:36.6 |
HIP 87664 |
13.80 |
| 2026-04-15 12:00 |
17:55:13.96 |
-33:28:27.8 |
HIP 87791 |
13.50 |
| 2026-04-16 00:00 |
17:55:15.44 |
-33:29:18.8 |
HIP 87791 |
12.70 |