메타데이터
| 항목 |
값 |
| Designation |
320P/McNaught |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2010-02-20T23:37:36.609600Z |
| Orbit solution date (soln_date, UTC) |
2026-07-21T13:12:12Z |
| Obs used |
121 |
| NEO |
Yes |
| M1 |
19.600 |
| K1 |
14.250 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2011-10-24.0000000 |
| e |
0.68237765 |
| q (au) |
0.985411 |
| a (au) |
3.102461 |
| i (deg) |
4.893595 |
| Ω (om, deg) |
295.955942 |
| ω (w, deg) |
0.655444 |
| M (ma, deg) |
110.023486 |
밝기
산란 + 전체 선형
$$
M_a = (20.000 + 5.331\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
20.000 |
| n |
5.331 |
| gf |
1.000 |
| gb |
-0.745 |
| k |
0.981 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
02:41:52.09 |
+22:10:46.5 |
HIP 12556 |
6.33 |
| 2026-07-29 12:00 |
02:42:45.78 |
+22:18:37.7 |
HIP 12556 |
17.84 |
| 2026-07-30 00:00 |
02:43:38.83 |
+22:26:22.8 |
HIP 12811 |
27.53 |
| 2026-07-30 12:00 |
02:44:31.26 |
+22:34:01.7 |
HIP 12811 |
31.47 |
| 2026-07-31 00:00 |
02:45:23.04 |
+22:41:34.6 |
HIP 12998 |
24.83 |
| 2026-07-31 12:00 |
02:46:14.19 |
+22:49:01.6 |
HIP 13012 |
16.51 |
| 2026-08-01 00:00 |
02:47:04.70 |
+22:56:22.7 |
HIP 13012 |
2.76 |
| 2026-08-01 12:00 |
02:47:54.57 |
+23:03:38.0 |
HIP 13012 |
10.83 |
| 2026-08-02 00:00 |
02:48:43.79 |
+23:10:47.6 |
HIP 13012 |
24.22 |
| 2026-08-02 12:00 |
02:49:32.37 |
+23:17:51.5 |
HIP 13242 |
25.90 |
| 2026-08-03 00:00 |
02:50:20.29 |
+23:24:49.9 |
HIP 13242 |
15.88 |
| 2026-08-03 12:00 |
02:51:07.55 |
+23:31:42.7 |
HIP 13242 |
13.06 |
| 2026-08-04 00:00 |
02:51:54.15 |
+23:38:30.0 |
HIP 13277 |
15.08 |
| 2026-08-04 12:00 |
02:52:40.09 |
+23:45:12.0 |
HIP 13277 |
24.37 |
| 2026-08-05 00:00 |
02:53:25.35 |
+23:51:48.6 |
HIP 13547 |
14.25 |
| 2026-08-05 12:00 |
02:54:09.94 |
+23:58:20.0 |
HIP 13547 |
8.51 |
| 2026-08-06 00:00 |
02:54:53.85 |
+24:04:46.1 |
HIP 13547 |
15.18 |
| 2026-08-06 12:00 |
02:55:37.08 |
+24:11:07.0 |
HIP 13547 |
25.76 |
| 2026-08-07 00:00 |
02:56:19.62 |
+24:17:22.8 |
HIP 13801 |
27.30 |
| 2026-08-07 12:00 |
02:57:01.46 |
+24:23:33.5 |
HIP 13867 |
26.56 |
| 2026-08-08 00:00 |
02:57:42.61 |
+24:29:39.2 |
HIP 13867 |
24.81 |
| 2026-08-08 12:00 |
02:58:23.04 |
+24:35:40.0 |
HIP 13867 |
27.80 |
| 2026-08-09 00:00 |
02:59:02.77 |
+24:41:35.8 |
HIP 13867 |
34.12 |
| 2026-08-09 12:00 |
02:59:41.78 |
+24:47:26.6 |
HIP 13994 |
28.09 |
| 2026-08-10 00:00 |
03:00:20.07 |
+24:53:12.7 |
HIP 14080 |
21.07 |
| 2026-08-10 12:00 |
03:00:57.63 |
+24:58:53.9 |
HIP 14080 |
11.09 |
| 2026-08-11 00:00 |
03:01:34.47 |
+25:04:30.4 |
HIP 14080 |
3.41 |
| 2026-08-11 12:00 |
03:02:10.56 |
+25:10:02.1 |
HIP 14080 |
9.92 |
| 2026-08-12 00:00 |
03:02:45.91 |
+25:15:29.1 |
HIP 14080 |
19.30 |
| 2026-08-12 12:00 |
03:03:20.52 |
+25:20:51.5 |
HIP 14080 |
28.68 |
| 2026-08-13 00:00 |
03:03:54.37 |
+25:26:09.2 |
HIP 14376 |
23.51 |
| 2026-08-13 12:00 |
03:04:27.47 |
+25:31:22.4 |
HIP 14376 |
20.90 |
| 2026-08-14 00:00 |
03:04:59.81 |
+25:36:31.0 |
HIP 14379 |
17.11 |
| 2026-08-14 12:00 |
03:05:31.39 |
+25:41:35.0 |
HIP 14379 |
10.55 |
| 2026-08-15 00:00 |
03:06:02.19 |
+25:46:34.6 |
HIP 14379 |
8.98 |
| 2026-08-15 12:00 |
03:06:32.23 |
+25:51:29.8 |
HIP 14379 |
13.83 |
| 2026-08-16 00:00 |
03:07:01.48 |
+25:56:20.5 |
HIP 14379 |
20.82 |
| 2026-08-16 12:00 |
03:07:29.96 |
+26:01:06.9 |
HIP 14594 |
22.64 |
| 2026-08-17 00:00 |
03:07:57.65 |
+26:05:48.8 |
HIP 14594 |
15.50 |
| 2026-08-17 12:00 |
03:08:24.56 |
+26:10:26.5 |
HIP 14594 |
9.54 |
| 2026-08-18 00:00 |
03:08:50.67 |
+26:14:59.8 |
HIP 14594 |
7.49 |
| 2026-08-18 12:00 |
03:09:15.99 |
+26:19:28.8 |
HIP 14594 |
11.27 |
| 2026-08-19 00:00 |
03:09:40.51 |
+26:23:53.6 |
HIP 14594 |
17.20 |