메타데이터
| 항목 |
값 |
| Designation |
366P/Spacewatch |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2012-01-05T10:45:06.180480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:37Z |
| Obs used |
74 |
| NEO |
- |
| M1 |
13.100 |
| K1 |
17.250 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2018-03-17T04:21:57.024000Z |
| Discovery magnitude (MPC) |
20.20 N |
| Discovery observatory (MPC) |
J04 · ESA Optical Ground Station, Tenerife |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2010-05-04.0000000 |
| e |
0.34736448 |
| q (au) |
2.284924 |
| a (au) |
3.501073 |
| i (deg) |
8.853746 |
| Ω (om, deg) |
70.797085 |
| ω (w, deg) |
153.581562 |
| M (ma, deg) |
268.005489 |
밝기
산란 + 전체 선형
$$
M_a = (14.631 + 4.779\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.631 |
| n |
4.779 |
| gf |
1.000 |
| gb |
-1.000 |
| 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) |
| 2026-09-25 00:00 |
23:34:25.84 |
-15:24:31.8 |
HIP 116368 |
11.30 |
| 2026-09-25 12:00 |
23:34:05.42 |
-15:25:58.2 |
HIP 116368 |
15.43 |
| 2026-09-26 00:00 |
23:33:45.08 |
-15:27:22.9 |
HIP 116218 |
15.03 |
| 2026-09-26 12:00 |
23:33:24.84 |
-15:28:45.9 |
HIP 116218 |
10.22 |
| 2026-09-27 00:00 |
23:33:04.71 |
-15:30:07.1 |
HIP 116218 |
5.91 |
| 2026-09-27 12:00 |
23:32:44.67 |
-15:31:26.6 |
HIP 116218 |
4.03 |
| 2026-09-28 00:00 |
23:32:24.74 |
-15:32:44.4 |
HIP 116218 |
6.88 |
| 2026-09-28 12:00 |
23:32:04.93 |
-15:34:00.3 |
HIP 116218 |
11.29 |
| 2026-09-29 00:00 |
23:31:45.22 |
-15:35:14.5 |
HIP 116218 |
15.98 |
| 2026-09-29 12:00 |
23:31:25.64 |
-15:36:26.9 |
HIP 116218 |
20.74 |
| 2026-09-30 00:00 |
23:31:06.18 |
-15:37:37.5 |
HIP 116051 |
21.50 |
| 2026-09-30 12:00 |
23:30:46.84 |
-15:38:46.3 |
HIP 116051 |
20.24 |
| 2026-10-01 00:00 |
23:30:27.63 |
-15:39:53.3 |
HIP 116051 |
20.10 |
| 2026-10-01 12:00 |
23:30:08.55 |
-15:40:58.5 |
HIP 116051 |
21.06 |
| 2026-10-02 00:00 |
23:29:49.61 |
-15:42:01.8 |
HIP 116051 |
22.97 |
| 2026-10-02 12:00 |
23:29:30.81 |
-15:43:03.2 |
HIP 116051 |
25.59 |
| 2026-10-03 00:00 |
23:29:12.15 |
-15:44:02.9 |
HIP 116051 |
28.72 |
| 2026-10-03 12:00 |
23:28:53.64 |
-15:45:00.6 |
HIP 115827 |
30.36 |
| 2026-10-04 00:00 |
23:28:35.27 |
-15:45:56.5 |
HIP 115827 |
29.51 |
| 2026-10-04 12:00 |
23:28:17.06 |
-15:46:50.5 |
HIP 115827 |
29.31 |
| 2026-10-05 00:00 |
23:27:59.01 |
-15:47:42.6 |
HIP 115827 |
29.76 |
| 2026-10-05 12:00 |
23:27:41.11 |
-15:48:32.8 |
HIP 115827 |
30.82 |
| 2026-10-06 00:00 |
23:27:23.38 |
-15:49:21.1 |
HIP 115668 |
27.34 |
| 2026-10-06 12:00 |
23:27:05.82 |
-15:50:07.5 |
HIP 115668 |
23.91 |
| 2026-10-07 00:00 |
23:26:48.42 |
-15:50:51.9 |
HIP 115668 |
20.86 |
| 2026-10-07 12:00 |
23:26:31.20 |
-15:51:34.5 |
HIP 115668 |
18.33 |
| 2026-10-08 00:00 |
23:26:14.15 |
-15:52:15.1 |
HIP 115668 |
16.53 |
| 2026-10-08 12:00 |
23:25:57.28 |
-15:52:53.8 |
HIP 115668 |
15.69 |
| 2026-10-09 00:00 |
23:25:40.60 |
-15:53:30.5 |
HIP 115668 |
15.91 |
| 2026-10-09 12:00 |
23:25:24.10 |
-15:54:05.3 |
HIP 115668 |
17.12 |
| 2026-10-10 00:00 |
23:25:07.78 |
-15:54:38.2 |
HIP 115668 |
19.11 |
| 2026-10-10 12:00 |
23:24:51.66 |
-15:55:09.1 |
HIP 115668 |
21.62 |
| 2026-10-11 00:00 |
23:24:35.73 |
-15:55:38.1 |
HIP 115668 |
24.48 |
| 2026-10-11 12:00 |
23:24:20.00 |
-15:56:05.1 |
HIP 115668 |
27.56 |
| 2026-10-12 00:00 |
23:24:04.47 |
-15:56:30.2 |
HIP 115668 |
30.77 |
| 2026-10-12 12:00 |
23:23:49.13 |
-15:56:53.3 |
HIP 115668 |
34.06 |
| 2026-10-13 00:00 |
23:23:34.01 |
-15:57:14.5 |
HIP 115668 |
37.38 |
| 2026-10-13 12:00 |
23:23:19.08 |
-15:57:33.7 |
HIP 115668 |
40.73 |
| 2026-10-14 00:00 |
23:23:04.37 |
-15:57:51.0 |
HIP 115668 |
44.07 |
| 2026-10-14 12:00 |
23:22:49.87 |
-15:58:06.4 |
HIP 115170 |
46.86 |
| 2026-10-15 00:00 |
23:22:35.57 |
-15:58:19.8 |
HIP 115170 |
43.58 |
| 2026-10-15 12:00 |
23:22:21.50 |
-15:58:31.2 |
HIP 115170 |
40.38 |
| 2026-10-16 00:00 |
23:22:07.64 |
-15:58:40.8 |
HIP 115170 |
37.25 |