메타데이터
| 항목 |
값 |
| Designation |
C/2013 P4 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-08-12T09:25:24.268800Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:39Z |
| Obs used |
229 |
| NEO |
- |
| M1 |
6.900 |
| K1 |
10.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2014-07-13.0000000 |
| e |
0.59605993 |
| q (au) |
5.967053 |
| a (au) |
14.772125 |
| i (deg) |
4.264367 |
| Ω (om, deg) |
256.614561 |
| ω (w, deg) |
113.559028 |
| M (ma, deg) |
359.472396 |
밝기
산란 + 전체 선형
$$
M_a = (2.500 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
2.500 |
| 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 |
10:10:33.01 |
+07:05:57.3 |
HIP 49704 |
34.63 |
| 2026-09-20 12:00 |
10:10:39.36 |
+07:05:18.2 |
HIP 49704 |
35.42 |
| 2026-09-21 00:00 |
10:10:45.69 |
+07:04:39.0 |
HIP 49999 |
35.19 |
| 2026-09-21 12:00 |
10:10:52.00 |
+07:04:00.0 |
HIP 49999 |
33.62 |
| 2026-09-22 00:00 |
10:10:58.28 |
+07:03:20.9 |
HIP 49999 |
32.07 |
| 2026-09-22 12:00 |
10:11:04.55 |
+07:02:42.0 |
HIP 49999 |
30.54 |
| 2026-09-23 00:00 |
10:11:10.79 |
+07:02:03.1 |
HIP 49999 |
29.03 |
| 2026-09-23 12:00 |
10:11:17.01 |
+07:01:24.3 |
HIP 49999 |
27.55 |
| 2026-09-24 00:00 |
10:11:23.20 |
+07:00:45.6 |
HIP 49999 |
26.09 |
| 2026-09-24 12:00 |
10:11:29.37 |
+07:00:07.0 |
HIP 49999 |
24.66 |
| 2026-09-25 00:00 |
10:11:35.52 |
+06:59:28.4 |
HIP 49999 |
23.27 |
| 2026-09-25 12:00 |
10:11:41.64 |
+06:58:49.9 |
HIP 49999 |
21.92 |
| 2026-09-26 00:00 |
10:11:47.74 |
+06:58:11.5 |
HIP 49999 |
20.62 |
| 2026-09-26 12:00 |
10:11:53.81 |
+06:57:33.1 |
HIP 49999 |
19.37 |
| 2026-09-27 00:00 |
10:11:59.86 |
+06:56:54.9 |
HIP 49999 |
18.19 |
| 2026-09-27 12:00 |
10:12:05.88 |
+06:56:16.7 |
HIP 49999 |
17.09 |
| 2026-09-28 00:00 |
10:12:11.87 |
+06:55:38.7 |
HIP 49999 |
16.08 |
| 2026-09-28 12:00 |
10:12:17.84 |
+06:55:00.7 |
HIP 49999 |
15.17 |
| 2026-09-29 00:00 |
10:12:23.78 |
+06:54:22.8 |
HIP 49999 |
14.39 |
| 2026-09-29 12:00 |
10:12:29.70 |
+06:53:45.0 |
HIP 49999 |
13.76 |
| 2026-09-30 00:00 |
10:12:35.59 |
+06:53:07.3 |
HIP 49999 |
13.29 |
| 2026-09-30 12:00 |
10:12:41.45 |
+06:52:29.7 |
HIP 49999 |
13.00 |
| 2026-10-01 00:00 |
10:12:47.28 |
+06:51:52.1 |
HIP 49999 |
12.90 |
| 2026-10-01 12:00 |
10:12:53.09 |
+06:51:14.7 |
HIP 49999 |
12.98 |
| 2026-10-02 00:00 |
10:12:58.86 |
+06:50:37.4 |
HIP 49999 |
13.26 |
| 2026-10-02 12:00 |
10:13:04.61 |
+06:50:00.2 |
HIP 49999 |
13.70 |
| 2026-10-03 00:00 |
10:13:10.33 |
+06:49:23.1 |
HIP 49999 |
14.29 |
| 2026-10-03 12:00 |
10:13:16.02 |
+06:48:46.2 |
HIP 49999 |
15.02 |
| 2026-10-04 00:00 |
10:13:21.68 |
+06:48:09.3 |
HIP 49999 |
15.86 |
| 2026-10-04 12:00 |
10:13:27.31 |
+06:47:32.5 |
HIP 49999 |
16.79 |
| 2026-10-05 00:00 |
10:13:32.90 |
+06:46:55.9 |
HIP 49999 |
17.79 |
| 2026-10-05 12:00 |
10:13:38.47 |
+06:46:19.4 |
HIP 50178 |
17.98 |
| 2026-10-06 00:00 |
10:13:44.01 |
+06:45:43.0 |
HIP 50178 |
17.39 |
| 2026-10-06 12:00 |
10:13:49.51 |
+06:45:06.7 |
HIP 50178 |
16.91 |
| 2026-10-07 00:00 |
10:13:54.99 |
+06:44:30.6 |
HIP 50178 |
16.55 |
| 2026-10-07 12:00 |
10:14:00.43 |
+06:43:54.6 |
HIP 50178 |
16.32 |
| 2026-10-08 00:00 |
10:14:05.84 |
+06:43:18.7 |
HIP 50178 |
16.23 |
| 2026-10-08 12:00 |
10:14:11.21 |
+06:42:43.0 |
HIP 50178 |
16.27 |
| 2026-10-09 00:00 |
10:14:16.55 |
+06:42:07.3 |
HIP 50178 |
16.44 |
| 2026-10-09 12:00 |
10:14:21.86 |
+06:41:31.9 |
HIP 50178 |
16.74 |
| 2026-10-10 00:00 |
10:14:27.14 |
+06:40:56.5 |
HIP 50178 |
17.15 |
| 2026-10-10 12:00 |
10:14:32.38 |
+06:40:21.4 |
HIP 50178 |
17.66 |
| 2026-10-11 00:00 |
10:14:37.58 |
+06:39:46.3 |
HIP 50178 |
18.27 |