메타데이터
| 항목 |
값 |
| Designation |
C/2002 P1 (NEAT) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2001-11-23T04:02:07.762560Z |
| Orbit solution date (soln_date, UTC) |
2026-07-06T12:12:23Z |
| Obs used |
102 |
| NEO |
- |
| M1 |
10.800 |
| K1 |
5.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2002-10-22.0000000 |
| e |
0.98422527 |
| q (au) |
6.530250 |
| a (au) |
413.968977 |
| i (deg) |
34.606091 |
| Ω (om, deg) |
310.672593 |
| ω (w, deg) |
347.764969 |
| M (ma, deg) |
0.038947 |
밝기
산란 + 전체 선형
$$
M_a = (14.523 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.523 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.776 |
| k |
0.800 |
| δ90 |
9.999 |
| 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 |
04:58:20.01 |
+51:08:14.7 |
HIP 23064 |
10.69 |
| 2026-07-29 12:00 |
04:58:23.16 |
+51:08:31.6 |
HIP 23064 |
11.18 |
| 2026-07-30 00:00 |
04:58:26.29 |
+51:08:48.5 |
HIP 23064 |
11.68 |
| 2026-07-30 12:00 |
04:58:29.39 |
+51:09:05.5 |
HIP 23064 |
12.18 |
| 2026-07-31 00:00 |
04:58:32.46 |
+51:09:22.6 |
HIP 23064 |
12.68 |
| 2026-07-31 12:00 |
04:58:35.50 |
+51:09:39.7 |
HIP 23140 |
13.08 |
| 2026-08-01 00:00 |
04:58:38.52 |
+51:09:56.9 |
HIP 23140 |
13.32 |
| 2026-08-01 12:00 |
04:58:41.50 |
+51:10:14.2 |
HIP 23140 |
13.57 |
| 2026-08-02 00:00 |
04:58:44.46 |
+51:10:31.6 |
HIP 23140 |
13.85 |
| 2026-08-02 12:00 |
04:58:47.39 |
+51:10:49.1 |
HIP 23140 |
14.14 |
| 2026-08-03 00:00 |
04:58:50.30 |
+51:11:06.6 |
HIP 23140 |
14.45 |
| 2026-08-03 12:00 |
04:58:53.17 |
+51:11:24.2 |
HIP 23140 |
14.77 |
| 2026-08-04 00:00 |
04:58:56.01 |
+51:11:41.8 |
HIP 23140 |
15.11 |
| 2026-08-04 12:00 |
04:58:58.83 |
+51:11:59.6 |
HIP 23140 |
15.46 |
| 2026-08-05 00:00 |
04:59:01.61 |
+51:12:17.4 |
HIP 23140 |
15.81 |
| 2026-08-05 12:00 |
04:59:04.37 |
+51:12:35.2 |
HIP 23140 |
16.18 |
| 2026-08-06 00:00 |
04:59:07.09 |
+51:12:53.1 |
HIP 23140 |
16.56 |
| 2026-08-06 12:00 |
04:59:09.79 |
+51:13:11.1 |
HIP 23140 |
16.94 |
| 2026-08-07 00:00 |
04:59:12.46 |
+51:13:29.2 |
HIP 23140 |
17.33 |
| 2026-08-07 12:00 |
04:59:15.09 |
+51:13:47.3 |
HIP 23140 |
17.73 |
| 2026-08-08 00:00 |
04:59:17.69 |
+51:14:05.5 |
HIP 23140 |
18.13 |
| 2026-08-08 12:00 |
04:59:20.27 |
+51:14:23.7 |
HIP 23140 |
18.54 |
| 2026-08-09 00:00 |
04:59:22.81 |
+51:14:42.0 |
HIP 23140 |
18.95 |
| 2026-08-09 12:00 |
04:59:25.32 |
+51:15:00.4 |
HIP 23140 |
19.36 |
| 2026-08-10 00:00 |
04:59:27.80 |
+51:15:18.8 |
HIP 23140 |
19.78 |
| 2026-08-10 12:00 |
04:59:30.25 |
+51:15:37.3 |
HIP 23140 |
20.20 |
| 2026-08-11 00:00 |
04:59:32.67 |
+51:15:55.8 |
HIP 23140 |
20.62 |
| 2026-08-11 12:00 |
04:59:35.05 |
+51:16:14.4 |
HIP 23140 |
21.05 |
| 2026-08-12 00:00 |
04:59:37.40 |
+51:16:33.0 |
HIP 23140 |
21.47 |
| 2026-08-12 12:00 |
04:59:39.72 |
+51:16:51.7 |
HIP 23140 |
21.90 |
| 2026-08-13 00:00 |
04:59:42.01 |
+51:17:10.4 |
HIP 23140 |
22.33 |
| 2026-08-13 12:00 |
04:59:44.26 |
+51:17:29.2 |
HIP 23140 |
22.76 |
| 2026-08-14 00:00 |
04:59:46.48 |
+51:17:48.0 |
HIP 23140 |
23.19 |
| 2026-08-14 12:00 |
04:59:48.67 |
+51:18:06.8 |
HIP 23140 |
23.61 |
| 2026-08-15 00:00 |
04:59:50.82 |
+51:18:25.8 |
HIP 23140 |
24.04 |
| 2026-08-15 12:00 |
04:59:52.94 |
+51:18:44.7 |
HIP 23140 |
24.47 |
| 2026-08-16 00:00 |
04:59:55.03 |
+51:19:03.7 |
HIP 23140 |
24.90 |
| 2026-08-16 12:00 |
04:59:57.08 |
+51:19:22.7 |
HIP 23140 |
25.32 |
| 2026-08-17 00:00 |
04:59:59.10 |
+51:19:41.8 |
HIP 23140 |
25.75 |
| 2026-08-17 12:00 |
05:00:01.09 |
+51:20:00.9 |
HIP 23140 |
26.17 |
| 2026-08-18 00:00 |
05:00:03.04 |
+51:20:20.0 |
HIP 23140 |
26.60 |
| 2026-08-18 12:00 |
05:00:04.96 |
+51:20:39.2 |
HIP 23140 |
27.02 |
| 2026-08-19 00:00 |
05:00:06.84 |
+51:20:58.4 |
HIP 23140 |
27.44 |