메타데이터
| 항목 |
값 |
| Designation |
484P/Spacewatch |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2020-11-26T18:15:30.545280Z |
| Orbit solution date (soln_date, UTC) |
2024-06-04T03:10:38Z |
| Obs used |
110 |
| NEO |
- |
| M1 |
15.200 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2005-12-05T11:14:51.360000Z |
| Discovery magnitude (MPC) |
20.50 V |
| Discovery observatory (MPC) |
691 · Steward Observatory, Kitt Peak-Spacewatch |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2018-02-09.0000000 |
| e |
0.43287084 |
| q (au) |
2.133422 |
| a (au) |
3.761791 |
| i (deg) |
14.469405 |
| Ω (om, deg) |
265.412826 |
| ω (w, deg) |
241.019247 |
| M (ma, deg) |
221.973893 |
밝기
산란 + 전체 선형
$$
M_a = (14.232 + 4.022\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.232 |
| n |
4.022 |
| 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) |
| 2026-03-26 00:00 |
00:07:00.27 |
+13:26:49.6 |
HIP 476 |
19.29 |
| 2026-03-26 12:00 |
00:07:28.54 |
+13:29:39.9 |
HIP 476 |
26.58 |
| 2026-03-27 00:00 |
00:07:56.83 |
+13:32:30.5 |
HIP 476 |
33.94 |
| 2026-03-27 12:00 |
00:08:25.12 |
+13:35:21.5 |
HIP 854 |
29.96 |
| 2026-03-28 00:00 |
00:08:53.43 |
+13:38:13.0 |
HIP 854 |
23.22 |
| 2026-03-28 12:00 |
00:09:21.74 |
+13:41:04.8 |
HIP 854 |
17.07 |
| 2026-03-29 00:00 |
00:09:50.06 |
+13:43:56.9 |
HIP 854 |
12.45 |
| 2026-03-29 12:00 |
00:10:18.39 |
+13:46:49.5 |
HIP 896 |
11.14 |
| 2026-03-30 00:00 |
00:10:46.73 |
+13:49:42.4 |
HIP 896 |
6.23 |
| 2026-03-30 12:00 |
00:11:15.08 |
+13:52:35.7 |
HIP 896 |
8.06 |
| 2026-03-31 00:00 |
00:11:43.43 |
+13:55:29.3 |
HIP 896 |
14.23 |
| 2026-03-31 12:00 |
00:12:11.79 |
+13:58:23.4 |
HIP 896 |
21.26 |
| 2026-04-01 00:00 |
00:12:40.15 |
+14:01:17.7 |
HIP 896 |
28.51 |
| 2026-04-01 12:00 |
00:13:08.52 |
+14:04:12.4 |
HIP 999 |
31.04 |
| 2026-04-02 00:00 |
00:13:36.90 |
+14:07:07.5 |
HIP 999 |
31.21 |
| 2026-04-02 12:00 |
00:14:05.28 |
+14:10:02.9 |
HIP 999 |
33.11 |
| 2026-04-03 00:00 |
00:14:33.66 |
+14:12:58.6 |
HIP 1277 |
36.41 |
| 2026-04-03 12:00 |
00:15:02.05 |
+14:15:54.7 |
HIP 1277 |
30.24 |
| 2026-04-04 00:00 |
00:15:30.44 |
+14:18:51.1 |
HIP 1277 |
24.80 |
| 2026-04-04 12:00 |
00:15:58.84 |
+14:21:47.8 |
HIP 1277 |
20.66 |
| 2026-04-05 00:00 |
00:16:27.24 |
+14:24:44.9 |
HIP 1277 |
18.72 |
| 2026-04-05 12:00 |
00:16:55.64 |
+14:27:42.2 |
HIP 1277 |
19.64 |
| 2026-04-06 00:00 |
00:17:24.04 |
+14:30:39.9 |
HIP 1277 |
23.08 |
| 2026-04-06 12:00 |
00:17:52.44 |
+14:33:37.9 |
HIP 1277 |
28.13 |
| 2026-04-07 00:00 |
00:18:20.85 |
+14:36:36.2 |
HIP 1528 |
27.47 |
| 2026-04-07 12:00 |
00:18:49.25 |
+14:39:34.8 |
HIP 1528 |
22.80 |
| 2026-04-08 00:00 |
00:19:17.66 |
+14:42:33.7 |
HIP 1528 |
19.91 |
| 2026-04-08 12:00 |
00:19:46.06 |
+14:45:32.9 |
HIP 1528 |
19.62 |
| 2026-04-09 00:00 |
00:20:14.47 |
+14:48:32.4 |
HIP 1528 |
22.02 |
| 2026-04-09 12:00 |
00:20:42.87 |
+14:51:32.2 |
HIP 1528 |
26.40 |
| 2026-04-10 00:00 |
00:21:11.27 |
+14:54:32.3 |
HIP 1643 |
26.47 |
| 2026-04-10 12:00 |
00:21:39.67 |
+14:57:32.6 |
HIP 1643 |
27.02 |
| 2026-04-11 00:00 |
00:22:08.06 |
+15:00:33.2 |
HIP 1643 |
29.51 |
| 2026-04-11 12:00 |
00:22:36.46 |
+15:03:34.1 |
HIP 1643 |
33.52 |
| 2026-04-12 00:00 |
00:23:04.84 |
+15:06:35.2 |
HIP 1975 |
30.08 |
| 2026-04-12 12:00 |
00:23:33.23 |
+15:09:36.6 |
HIP 1975 |
22.60 |
| 2026-04-13 00:00 |
00:24:01.60 |
+15:12:38.3 |
HIP 1975 |
15.14 |
| 2026-04-13 12:00 |
00:24:29.98 |
+15:15:40.2 |
HIP 1975 |
7.72 |
| 2026-04-14 00:00 |
00:24:58.34 |
+15:18:42.4 |
HIP 1975 |
1.43 |
| 2026-04-14 12:00 |
00:25:26.70 |
+15:21:44.8 |
HIP 1975 |
7.52 |
| 2026-04-15 00:00 |
00:25:55.05 |
+15:24:47.4 |
HIP 2015 |
10.36 |
| 2026-04-15 12:00 |
00:26:23.40 |
+15:27:50.3 |
HIP 2015 |
13.44 |
| 2026-04-16 00:00 |
00:26:51.73 |
+15:30:53.4 |
HIP 2015 |
19.12 |