메타데이터
| 항목 |
값 |
| Designation |
468P/Siding Spring |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-11-23T01:26:27.240000Z |
| Orbit solution date (soln_date, UTC) |
2024-07-22T18:42:17Z |
| Obs used |
159 |
| NEO |
- |
| M1 |
11.500 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-07-19T08:58:28.416000Z |
| Discovery magnitude (MPC) |
19.60 V |
| Discovery observatory (MPC) |
I47 · Pierre Auger Observatory, Malargüe |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2017-06-10.0000000 |
| e |
0.44478834 |
| q (au) |
3.967881 |
| a (au) |
7.146610 |
| i (deg) |
50.364692 |
| Ω (om, deg) |
356.098740 |
| ω (w, deg) |
322.249960 |
| M (ma, deg) |
238.402517 |
밝기
산란 + 전체 선형
$$
M_a = (6.096 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
6.096 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| 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 |
02:54:43.39 |
+68:25:47.7 |
HIP 13743 |
19.45 |
| 2026-09-20 12:00 |
02:54:23.53 |
+68:29:04.6 |
HIP 13465 |
16.82 |
| 2026-09-21 00:00 |
02:54:03.23 |
+68:32:20.0 |
HIP 13465 |
13.17 |
| 2026-09-21 12:00 |
02:53:42.50 |
+68:35:33.9 |
HIP 13465 |
9.61 |
| 2026-09-22 00:00 |
02:53:21.33 |
+68:38:46.1 |
HIP 13465 |
6.29 |
| 2026-09-22 12:00 |
02:52:59.73 |
+68:41:56.8 |
HIP 13465 |
3.89 |
| 2026-09-23 00:00 |
02:52:37.69 |
+68:45:05.9 |
HIP 13465 |
4.34 |
| 2026-09-23 12:00 |
02:52:15.22 |
+68:48:13.3 |
HIP 13367 |
5.30 |
| 2026-09-24 00:00 |
02:51:52.32 |
+68:51:19.0 |
HIP 13367 |
2.08 |
| 2026-09-24 12:00 |
02:51:28.98 |
+68:54:23.0 |
HIP 13367 |
2.89 |
| 2026-09-25 00:00 |
02:51:05.20 |
+68:57:25.4 |
HIP 13367 |
6.33 |
| 2026-09-25 12:00 |
02:50:41.00 |
+69:00:25.9 |
HIP 13367 |
9.97 |
| 2026-09-26 00:00 |
02:50:16.37 |
+69:03:24.8 |
HIP 13367 |
13.65 |
| 2026-09-26 12:00 |
02:49:51.30 |
+69:06:21.8 |
HIP 13367 |
17.34 |
| 2026-09-27 00:00 |
02:49:25.81 |
+69:09:17.1 |
HIP 13367 |
21.04 |
| 2026-09-27 12:00 |
02:48:59.89 |
+69:12:10.5 |
HIP 13367 |
24.73 |
| 2026-09-28 00:00 |
02:48:33.54 |
+69:15:02.0 |
HIP 13133 |
23.10 |
| 2026-09-28 12:00 |
02:48:06.77 |
+69:17:51.7 |
HIP 13133 |
20.64 |
| 2026-09-29 00:00 |
02:47:39.57 |
+69:20:39.5 |
HIP 13133 |
18.62 |
| 2026-09-29 12:00 |
02:47:11.96 |
+69:23:25.4 |
HIP 13133 |
17.21 |
| 2026-09-30 00:00 |
02:46:43.92 |
+69:26:09.3 |
HIP 13133 |
16.55 |
| 2026-09-30 12:00 |
02:46:15.46 |
+69:28:51.2 |
HIP 12734 |
14.31 |
| 2026-10-01 00:00 |
02:45:46.59 |
+69:31:31.2 |
HIP 12734 |
11.12 |
| 2026-10-01 12:00 |
02:45:17.31 |
+69:34:09.2 |
HIP 12734 |
8.31 |
| 2026-10-02 00:00 |
02:44:47.61 |
+69:36:45.1 |
HIP 12734 |
6.39 |
| 2026-10-02 12:00 |
02:44:17.51 |
+69:39:18.9 |
HIP 12734 |
6.26 |
| 2026-10-03 00:00 |
02:43:46.99 |
+69:41:50.6 |
HIP 12734 |
8.00 |
| 2026-10-03 12:00 |
02:43:16.08 |
+69:44:20.3 |
HIP 12567 |
8.77 |
| 2026-10-04 00:00 |
02:42:44.76 |
+69:46:47.8 |
HIP 12567 |
7.23 |
| 2026-10-04 12:00 |
02:42:13.05 |
+69:49:13.1 |
HIP 12567 |
7.34 |
| 2026-10-05 00:00 |
02:41:40.95 |
+69:51:36.3 |
HIP 12567 |
9.03 |
| 2026-10-05 12:00 |
02:41:08.45 |
+69:53:57.2 |
HIP 12567 |
11.64 |
| 2026-10-06 00:00 |
02:40:35.57 |
+69:56:15.9 |
HIP 12567 |
14.67 |
| 2026-10-06 12:00 |
02:40:02.31 |
+69:58:32.4 |
HIP 12567 |
17.92 |
| 2026-10-07 00:00 |
02:39:28.67 |
+70:00:46.6 |
HIP 12567 |
21.28 |
| 2026-10-07 12:00 |
02:38:54.66 |
+70:02:58.5 |
HIP 12567 |
24.71 |
| 2026-10-08 00:00 |
02:38:20.28 |
+70:05:08.0 |
HIP 11874 |
27.32 |
| 2026-10-08 12:00 |
02:37:45.54 |
+70:07:15.3 |
HIP 11874 |
23.91 |
| 2026-10-09 00:00 |
02:37:10.44 |
+70:09:20.1 |
HIP 11874 |
20.55 |
| 2026-10-09 12:00 |
02:36:34.99 |
+70:11:22.6 |
HIP 11874 |
17.30 |
| 2026-10-10 00:00 |
02:35:59.19 |
+70:13:22.6 |
HIP 11874 |
14.21 |
| 2026-10-10 12:00 |
02:35:23.05 |
+70:15:20.3 |
HIP 11874 |
11.42 |
| 2026-10-11 00:00 |
02:34:46.58 |
+70:17:15.5 |
HIP 11874 |
9.20 |