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) |
| 2026-05-12 00:00 |
00:06:15.30 |
+28:58:54.7 |
HIP 544 |
5.23 |
| 2026-05-12 12:00 |
00:06:51.12 |
+29:04:51.4 |
HIP 544 |
4.76 |
| 2026-05-13 00:00 |
00:07:26.82 |
+29:10:47.8 |
HIP 677 |
13.42 |
| 2026-05-13 12:00 |
00:08:02.40 |
+29:16:44.0 |
HIP 677 |
12.16 |
| 2026-05-14 00:00 |
00:08:37.85 |
+29:22:39.9 |
HIP 677 |
17.51 |
| 2026-05-14 12:00 |
00:09:13.18 |
+29:28:35.5 |
HIP 667 |
20.07 |
| 2026-05-15 00:00 |
00:09:48.39 |
+29:34:30.9 |
HIP 895 |
15.95 |
| 2026-05-15 12:00 |
00:10:23.47 |
+29:40:26.0 |
HIP 895 |
11.08 |
| 2026-05-16 00:00 |
00:10:58.42 |
+29:46:20.8 |
HIP 895 |
13.33 |
| 2026-05-16 12:00 |
00:11:33.25 |
+29:52:15.3 |
HIP 895 |
20.43 |
| 2026-05-17 00:00 |
00:12:07.94 |
+29:58:09.5 |
HIP 895 |
28.98 |
| 2026-05-17 12:00 |
00:12:42.51 |
+30:04:03.4 |
HIP 919 |
28.72 |
| 2026-05-18 00:00 |
00:13:16.95 |
+30:09:57.0 |
HIP 919 |
30.03 |
| 2026-05-18 12:00 |
00:13:51.25 |
+30:15:50.3 |
HIP 919 |
34.01 |
| 2026-05-19 00:00 |
00:14:25.43 |
+30:21:43.3 |
HIP 1294 |
25.04 |
| 2026-05-19 12:00 |
00:14:59.47 |
+30:27:35.9 |
HIP 1294 |
16.11 |
| 2026-05-20 00:00 |
00:15:33.37 |
+30:33:28.3 |
HIP 1294 |
8.34 |
| 2026-05-20 12:00 |
00:16:07.15 |
+30:39:20.3 |
HIP 1294 |
7.45 |
| 2026-05-21 00:00 |
00:16:40.78 |
+30:45:12.0 |
HIP 1294 |
14.68 |
| 2026-05-21 12:00 |
00:17:14.28 |
+30:51:03.3 |
HIP 1367 |
13.52 |
| 2026-05-22 00:00 |
00:17:47.64 |
+30:56:54.4 |
HIP 1367 |
11.74 |
| 2026-05-22 12:00 |
00:18:20.87 |
+31:02:45.0 |
HIP 1448 |
15.37 |
| 2026-05-23 00:00 |
00:18:53.96 |
+31:08:35.4 |
HIP 1448 |
14.43 |
| 2026-05-23 12:00 |
00:19:26.90 |
+31:14:25.4 |
HIP 1448 |
18.64 |
| 2026-05-24 00:00 |
00:19:59.71 |
+31:20:15.0 |
HIP 1493 |
20.46 |
| 2026-05-24 12:00 |
00:20:32.38 |
+31:26:04.3 |
HIP 1493 |
24.84 |
| 2026-05-25 00:00 |
00:21:04.90 |
+31:31:53.2 |
HIP 1493 |
31.27 |
| 2026-05-25 12:00 |
00:21:37.28 |
+31:37:41.8 |
HIP 1853 |
26.50 |
| 2026-05-26 00:00 |
00:22:09.52 |
+31:43:30.0 |
HIP 1853 |
17.71 |
| 2026-05-26 12:00 |
00:22:41.62 |
+31:49:17.9 |
HIP 1853 |
9.35 |
| 2026-05-27 00:00 |
00:23:13.57 |
+31:55:05.4 |
HIP 1853 |
4.66 |
| 2026-05-27 12:00 |
00:23:45.38 |
+32:00:52.5 |
HIP 1853 |
10.71 |
| 2026-05-28 00:00 |
00:24:17.03 |
+32:06:39.3 |
HIP 1853 |
19.10 |
| 2026-05-28 12:00 |
00:24:48.55 |
+32:12:25.6 |
HIP 2082 |
18.87 |
| 2026-05-29 00:00 |
00:25:19.91 |
+32:18:11.7 |
HIP 1997 |
12.02 |
| 2026-05-29 12:00 |
00:25:51.12 |
+32:23:57.3 |
HIP 1997 |
9.27 |
| 2026-05-30 00:00 |
00:26:22.19 |
+32:29:42.6 |
HIP 1997 |
13.39 |
| 2026-05-30 12:00 |
00:26:53.10 |
+32:35:27.5 |
HIP 1997 |
20.57 |
| 2026-05-31 00:00 |
00:27:23.86 |
+32:41:12.0 |
HIP 2243 |
20.22 |
| 2026-05-31 12:00 |
00:27:54.47 |
+32:46:56.1 |
HIP 2243 |
21.88 |
| 2026-06-01 00:00 |
00:28:24.93 |
+32:52:39.9 |
HIP 2324 |
16.89 |
| 2026-06-01 12:00 |
00:28:55.23 |
+32:58:23.2 |
HIP 2324 |
9.24 |
| 2026-06-02 00:00 |
00:29:25.37 |
+33:04:06.2 |
HIP 2324 |
5.66 |