메타데이터
| 항목 |
값 |
| Designation |
C/2007 P1 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2007-04-03T06:43:48.607680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:10Z |
| Obs used |
16 |
| NEO |
- |
| M1 |
13.600 |
| K1 |
10.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2007-08-10.0000000 |
| e |
1.00042564 |
| q (au) |
0.522246 |
| a (au) |
-1226.959668 |
| i (deg) |
119.181662 |
| Ω (om, deg) |
187.061353 |
| ω (w, deg) |
90.192851 |
| M (ma, deg) |
0.002952 |
밝기
산란 + 전체 선형
$$
M_a = (17.762 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
17.762 |
| n |
2.000 |
| gf |
0.999 |
| gb |
-1.000 |
| k |
0.800 |
| 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 |
23:10:55.27 |
-71:46:55.6 |
HIP 114693 |
37.37 |
| 2026-03-26 12:00 |
23:11:03.54 |
-71:47:02.8 |
HIP 114693 |
37.23 |
| 2026-03-27 00:00 |
23:11:11.80 |
-71:47:10.3 |
HIP 114693 |
37.10 |
| 2026-03-27 12:00 |
23:11:20.03 |
-71:47:18.1 |
HIP 114693 |
36.99 |
| 2026-03-28 00:00 |
23:11:28.24 |
-71:47:26.2 |
HIP 114693 |
36.90 |
| 2026-03-28 12:00 |
23:11:36.42 |
-71:47:34.7 |
HIP 114693 |
36.82 |
| 2026-03-29 00:00 |
23:11:44.58 |
-71:47:43.5 |
HIP 114693 |
36.77 |
| 2026-03-29 12:00 |
23:11:52.72 |
-71:47:52.7 |
HIP 114693 |
36.73 |
| 2026-03-30 00:00 |
23:12:00.83 |
-71:48:02.2 |
HIP 114693 |
36.70 |
| 2026-03-30 12:00 |
23:12:08.92 |
-71:48:12.0 |
HIP 114693 |
36.70 |
| 2026-03-31 00:00 |
23:12:16.98 |
-71:48:22.1 |
HIP 114693 |
36.71 |
| 2026-03-31 12:00 |
23:12:25.01 |
-71:48:32.5 |
HIP 114693 |
36.74 |
| 2026-04-01 00:00 |
23:12:33.02 |
-71:48:43.3 |
HIP 114545 |
36.74 |
| 2026-04-01 12:00 |
23:12:41.00 |
-71:48:54.4 |
HIP 114545 |
36.59 |
| 2026-04-02 00:00 |
23:12:48.95 |
-71:49:05.9 |
HIP 114545 |
36.45 |
| 2026-04-02 12:00 |
23:12:56.88 |
-71:49:17.6 |
HIP 114545 |
36.31 |
| 2026-04-03 00:00 |
23:13:04.78 |
-71:49:29.7 |
HIP 114545 |
36.18 |
| 2026-04-03 12:00 |
23:13:12.65 |
-71:49:42.1 |
HIP 114545 |
36.05 |
| 2026-04-04 00:00 |
23:13:20.48 |
-71:49:54.8 |
HIP 114545 |
35.93 |
| 2026-04-04 12:00 |
23:13:28.29 |
-71:50:07.9 |
HIP 114545 |
35.81 |
| 2026-04-05 00:00 |
23:13:36.07 |
-71:50:21.2 |
HIP 114545 |
35.70 |
| 2026-04-05 12:00 |
23:13:43.82 |
-71:50:34.9 |
HIP 114545 |
35.59 |
| 2026-04-06 00:00 |
23:13:51.54 |
-71:50:49.0 |
HIP 114545 |
35.49 |
| 2026-04-06 12:00 |
23:13:59.23 |
-71:51:03.3 |
HIP 114545 |
35.39 |
| 2026-04-07 00:00 |
23:14:06.88 |
-71:51:17.9 |
HIP 114545 |
35.30 |
| 2026-04-07 12:00 |
23:14:14.51 |
-71:51:32.9 |
HIP 114545 |
35.22 |
| 2026-04-08 00:00 |
23:14:22.10 |
-71:51:48.2 |
HIP 114545 |
35.14 |
| 2026-04-08 12:00 |
23:14:29.65 |
-71:52:03.8 |
HIP 114545 |
35.06 |
| 2026-04-09 00:00 |
23:14:37.17 |
-71:52:19.7 |
HIP 114545 |
34.99 |
| 2026-04-09 12:00 |
23:14:44.66 |
-71:52:36.0 |
HIP 114545 |
34.93 |
| 2026-04-10 00:00 |
23:14:52.12 |
-71:52:52.5 |
HIP 114545 |
34.87 |
| 2026-04-10 12:00 |
23:14:59.53 |
-71:53:09.4 |
HIP 114545 |
34.82 |
| 2026-04-11 00:00 |
23:15:06.92 |
-71:53:26.6 |
HIP 114545 |
34.77 |
| 2026-04-11 12:00 |
23:15:14.26 |
-71:53:44.1 |
HIP 114545 |
34.73 |
| 2026-04-12 00:00 |
23:15:21.57 |
-71:54:01.9 |
HIP 114545 |
34.70 |
| 2026-04-12 12:00 |
23:15:28.85 |
-71:54:20.0 |
HIP 114545 |
34.67 |
| 2026-04-13 00:00 |
23:15:36.08 |
-71:54:38.5 |
HIP 114545 |
34.64 |
| 2026-04-13 12:00 |
23:15:43.28 |
-71:54:57.2 |
HIP 115180 |
34.22 |
| 2026-04-14 00:00 |
23:15:50.44 |
-71:55:16.3 |
HIP 115180 |
33.65 |
| 2026-04-14 12:00 |
23:15:57.56 |
-71:55:35.6 |
HIP 115180 |
33.09 |
| 2026-04-15 00:00 |
23:16:04.64 |
-71:55:55.3 |
HIP 115180 |
32.52 |
| 2026-04-15 12:00 |
23:16:11.68 |
-71:56:15.3 |
HIP 115180 |
31.96 |
| 2026-04-16 00:00 |
23:16:18.68 |
-71:56:35.5 |
HIP 115180 |
31.39 |