메타데이터
| 항목 |
값 |
| Designation |
125P/Spacewatch |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-02-17T02:03:36.748800Z |
| Orbit solution date (soln_date, UTC) |
2024-10-29T14:53:15Z |
| Obs used |
1297 |
| NEO |
- |
| M1 |
12.900 |
| K1 |
16.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-08-11.0000000 |
| e |
0.51269168 |
| q (au) |
1.523187 |
| a (au) |
3.125715 |
| i (deg) |
9.988031 |
| Ω (om, deg) |
153.195189 |
| ω (w, deg) |
87.145345 |
| M (ma, deg) |
161.393997 |
밝기
산란 + 전체 선형
$$
M_a = (12.400 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.400 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.850 |
| k |
0.999 |
| 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) |
| 2026-06-01 00:00 |
03:22:39.79 |
+10:18:44.3 |
HIP 15837 |
21.58 |
| 2026-06-01 12:00 |
03:23:06.51 |
+10:20:08.4 |
HIP 15837 |
15.09 |
| 2026-06-02 00:00 |
03:23:33.21 |
+10:21:31.9 |
HIP 15837 |
8.96 |
| 2026-06-02 12:00 |
03:23:59.87 |
+10:22:54.7 |
HIP 15837 |
4.79 |
| 2026-06-03 00:00 |
03:24:26.50 |
+10:24:16.9 |
HIP 15837 |
7.44 |
| 2026-06-03 12:00 |
03:24:53.10 |
+10:25:38.4 |
HIP 15837 |
13.31 |
| 2026-06-04 00:00 |
03:25:19.67 |
+10:26:59.3 |
HIP 15837 |
19.70 |
| 2026-06-04 12:00 |
03:25:46.21 |
+10:28:19.6 |
HIP 15837 |
26.21 |
| 2026-06-05 00:00 |
03:26:12.71 |
+10:29:39.2 |
HIP 15837 |
32.78 |
| 2026-06-05 12:00 |
03:26:39.18 |
+10:30:58.1 |
HIP 15922 |
36.09 |
| 2026-06-06 00:00 |
03:27:05.61 |
+10:32:16.4 |
HIP 15922 |
39.70 |
| 2026-06-06 12:00 |
03:27:32.01 |
+10:33:34.0 |
HIP 16250 |
34.54 |
| 2026-06-07 00:00 |
03:27:58.38 |
+10:34:51.0 |
HIP 16250 |
28.70 |
| 2026-06-07 12:00 |
03:28:24.70 |
+10:36:07.3 |
HIP 16250 |
23.28 |
| 2026-06-08 00:00 |
03:28:50.99 |
+10:37:23.0 |
HIP 16250 |
18.66 |
| 2026-06-08 12:00 |
03:29:17.24 |
+10:38:38.0 |
HIP 16250 |
15.52 |
| 2026-06-09 00:00 |
03:29:43.45 |
+10:39:52.3 |
HIP 16250 |
14.84 |
| 2026-06-09 12:00 |
03:30:09.63 |
+10:41:06.0 |
HIP 16325 |
14.18 |
| 2026-06-10 00:00 |
03:30:35.76 |
+10:42:19.0 |
HIP 16325 |
14.97 |
| 2026-06-10 12:00 |
03:31:01.85 |
+10:43:31.3 |
HIP 16325 |
18.22 |
| 2026-06-11 00:00 |
03:31:27.90 |
+10:44:42.9 |
HIP 16504 |
14.55 |
| 2026-06-11 12:00 |
03:31:53.91 |
+10:45:53.9 |
HIP 16504 |
8.31 |
| 2026-06-12 00:00 |
03:32:19.87 |
+10:47:04.2 |
HIP 16504 |
3.31 |
| 2026-06-12 12:00 |
03:32:45.79 |
+10:48:13.8 |
HIP 16504 |
6.05 |
| 2026-06-13 00:00 |
03:33:11.67 |
+10:49:22.7 |
HIP 16504 |
12.07 |
| 2026-06-13 12:00 |
03:33:37.50 |
+10:50:30.9 |
HIP 16504 |
18.38 |
| 2026-06-14 00:00 |
03:34:03.28 |
+10:51:38.5 |
HIP 16715 |
18.48 |
| 2026-06-14 12:00 |
03:34:29.02 |
+10:52:45.3 |
HIP 16715 |
13.09 |
| 2026-06-15 00:00 |
03:34:54.70 |
+10:53:51.5 |
HIP 16715 |
9.15 |
| 2026-06-15 12:00 |
03:35:20.34 |
+10:54:56.9 |
HIP 16715 |
8.83 |
| 2026-06-16 00:00 |
03:35:45.93 |
+10:56:01.7 |
HIP 16715 |
12.40 |
| 2026-06-16 12:00 |
03:36:11.47 |
+10:57:05.7 |
HIP 16715 |
17.62 |
| 2026-06-17 00:00 |
03:36:36.95 |
+10:58:09.1 |
HIP 16715 |
23.40 |
| 2026-06-17 12:00 |
03:37:02.39 |
+10:59:11.7 |
HIP 16715 |
29.40 |
| 2026-06-18 00:00 |
03:37:27.77 |
+11:00:13.7 |
HIP 17040 |
25.82 |
| 2026-06-18 12:00 |
03:37:53.09 |
+11:01:14.9 |
HIP 17040 |
19.53 |
| 2026-06-19 00:00 |
03:38:18.36 |
+11:02:15.5 |
HIP 17040 |
13.26 |
| 2026-06-19 12:00 |
03:38:43.58 |
+11:03:15.3 |
HIP 17040 |
7.03 |
| 2026-06-20 00:00 |
03:39:08.74 |
+11:04:14.4 |
HIP 17040 |
1.27 |
| 2026-06-20 12:00 |
03:39:33.84 |
+11:05:12.8 |
HIP 17040 |
5.64 |
| 2026-06-21 00:00 |
03:39:58.88 |
+11:06:10.5 |
HIP 17040 |
11.81 |
| 2026-06-21 12:00 |
03:40:23.87 |
+11:07:07.5 |
HIP 17040 |
17.99 |
| 2026-06-22 00:00 |
03:40:48.79 |
+11:08:03.8 |
HIP 17040 |
24.17 |