메타데이터
| 항목 |
값 |
| Designation |
508P/McNaught |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2012-01-15T03:13:20.297280Z |
| Orbit solution date (soln_date, UTC) |
2026-03-12T02:49:59Z |
| Obs used |
115 |
| NEO |
- |
| M1 |
14.400 |
| K1 |
23.250 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2005-05-03T17:19:54.624000Z |
| Discovery magnitude (MPC) |
17.60 T |
| Discovery observatory (MPC) |
E12 · Siding Spring Survey |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2008-12-17.0000000 |
| e |
0.57045556 |
| q (au) |
1.533483 |
| a (au) |
3.570023 |
| i (deg) |
31.765073 |
| Ω (om, deg) |
268.821639 |
| ω (w, deg) |
339.031332 |
| M (ma, deg) |
195.746050 |
밝기
산란 + 전체 선형
$$
M_a = (19.357 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
19.357 |
| n |
2.000 |
| gf |
1.000 |
| 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) |
| 2026-09-20 00:00 |
00:36:59.26 |
+46:21:06.2 |
HIP 3043 |
18.11 |
| 2026-09-20 12:00 |
00:36:30.43 |
+46:20:06.4 |
HIP 2807 |
21.87 |
| 2026-09-21 00:00 |
00:36:01.51 |
+46:19:02.6 |
HIP 2807 |
21.59 |
| 2026-09-21 12:00 |
00:35:32.51 |
+46:17:54.8 |
HIP 2807 |
22.56 |
| 2026-09-22 00:00 |
00:35:03.42 |
+46:16:43.0 |
HIP 2807 |
24.65 |
| 2026-09-22 12:00 |
00:34:34.27 |
+46:15:27.2 |
HIP 2807 |
27.61 |
| 2026-09-23 00:00 |
00:34:05.06 |
+46:14:07.5 |
HIP 2507 |
30.24 |
| 2026-09-23 12:00 |
00:33:35.79 |
+46:12:43.8 |
HIP 2507 |
25.45 |
| 2026-09-24 00:00 |
00:33:06.47 |
+46:11:16.1 |
HIP 2507 |
20.85 |
| 2026-09-24 12:00 |
00:32:37.10 |
+46:09:44.5 |
HIP 2507 |
16.59 |
| 2026-09-25 00:00 |
00:32:07.70 |
+46:08:08.9 |
HIP 2507 |
13.05 |
| 2026-09-25 12:00 |
00:31:38.27 |
+46:06:29.4 |
HIP 2507 |
11.02 |
| 2026-09-26 00:00 |
00:31:08.82 |
+46:04:46.0 |
HIP 2507 |
11.36 |
| 2026-09-26 12:00 |
00:30:39.35 |
+46:02:58.6 |
HIP 2507 |
13.93 |
| 2026-09-27 00:00 |
00:30:09.86 |
+46:01:07.3 |
HIP 2507 |
17.82 |
| 2026-09-27 12:00 |
00:29:40.38 |
+45:59:12.2 |
HIP 2507 |
22.36 |
| 2026-09-28 00:00 |
00:29:10.90 |
+45:57:13.1 |
HIP 2335 |
26.82 |
| 2026-09-28 12:00 |
00:28:41.43 |
+45:55:10.2 |
HIP 2335 |
30.45 |
| 2026-09-29 00:00 |
00:28:11.97 |
+45:53:03.5 |
HIP 2335 |
34.64 |
| 2026-09-29 12:00 |
00:27:42.54 |
+45:50:52.9 |
HIP 1978 |
29.24 |
| 2026-09-30 00:00 |
00:27:13.13 |
+45:48:38.4 |
HIP 1978 |
23.67 |
| 2026-09-30 12:00 |
00:26:43.76 |
+45:46:20.2 |
HIP 1978 |
18.11 |
| 2026-10-01 00:00 |
00:26:14.44 |
+45:43:58.2 |
HIP 1978 |
12.57 |
| 2026-10-01 12:00 |
00:25:45.16 |
+45:41:32.4 |
HIP 1978 |
7.18 |
| 2026-10-02 00:00 |
00:25:15.94 |
+45:39:02.9 |
HIP 1978 |
3.10 |
| 2026-10-02 12:00 |
00:24:46.78 |
+45:36:29.6 |
HIP 1978 |
5.71 |
| 2026-10-03 00:00 |
00:24:17.68 |
+45:33:52.7 |
HIP 1978 |
11.02 |
| 2026-10-03 12:00 |
00:23:48.67 |
+45:31:12.0 |
HIP 1978 |
16.63 |
| 2026-10-04 00:00 |
00:23:19.73 |
+45:28:27.7 |
HIP 1978 |
22.34 |
| 2026-10-04 12:00 |
00:22:50.88 |
+45:25:39.8 |
HIP 1879 |
22.31 |
| 2026-10-05 00:00 |
00:22:22.13 |
+45:22:48.3 |
HIP 1642 |
20.66 |
| 2026-10-05 12:00 |
00:21:53.48 |
+45:19:53.1 |
HIP 1642 |
17.70 |
| 2026-10-06 00:00 |
00:21:24.94 |
+45:16:54.5 |
HIP 1642 |
16.41 |
| 2026-10-06 12:00 |
00:20:56.51 |
+45:13:52.3 |
HIP 1642 |
17.17 |
| 2026-10-07 00:00 |
00:20:28.21 |
+45:10:46.6 |
HIP 1642 |
19.78 |
| 2026-10-07 12:00 |
00:20:00.03 |
+45:07:37.5 |
HIP 1642 |
23.63 |
| 2026-10-08 00:00 |
00:19:31.98 |
+45:04:24.9 |
HIP 1593 |
22.20 |
| 2026-10-08 12:00 |
00:19:04.07 |
+45:01:09.0 |
HIP 1593 |
20.58 |
| 2026-10-09 00:00 |
00:18:36.32 |
+44:57:49.7 |
HIP 1409 |
16.64 |
| 2026-10-09 12:00 |
00:18:08.71 |
+44:54:27.2 |
HIP 1409 |
11.12 |
| 2026-10-10 00:00 |
00:17:41.26 |
+44:51:01.3 |
HIP 1409 |
6.34 |
| 2026-10-10 12:00 |
00:17:13.98 |
+44:47:32.2 |
HIP 1409 |
5.23 |
| 2026-10-11 00:00 |
00:16:46.87 |
+44:44:00.0 |
HIP 1409 |
9.23 |