메타데이터
| 항목 |
값 |
| Designation |
P/2015 P4 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-01-19T00:45:47.321280Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:13Z |
| Obs used |
80 |
| NEO |
- |
| M1 |
6.500 |
| K1 |
28.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-09-21.0000000 |
| e |
0.58423891 |
| q (au) |
2.525162 |
| a (au) |
6.073589 |
| i (deg) |
8.713757 |
| Ω (om, deg) |
104.746924 |
| ω (w, deg) |
280.816811 |
| M (ma, deg) |
352.096266 |
밝기
산란 + 전체 선형
$$
M_a = (11.240 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.240 |
| 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) |
| 2026-06-01 00:00 |
15:10:02.21 |
-09:26:30.0 |
HIP 74246 |
27.10 |
| 2026-06-01 12:00 |
15:09:51.47 |
-09:26:02.0 |
HIP 74246 |
28.14 |
| 2026-06-02 00:00 |
15:09:40.78 |
-09:25:34.5 |
HIP 74246 |
29.38 |
| 2026-06-02 12:00 |
15:09:30.14 |
-09:25:07.4 |
HIP 74081 |
29.96 |
| 2026-06-03 00:00 |
15:09:19.55 |
-09:24:40.7 |
HIP 74081 |
28.89 |
| 2026-06-03 12:00 |
15:09:09.02 |
-09:24:14.5 |
HIP 74081 |
28.03 |
| 2026-06-04 00:00 |
15:08:58.55 |
-09:23:48.8 |
HIP 74081 |
27.39 |
| 2026-06-04 12:00 |
15:08:48.13 |
-09:23:23.5 |
HIP 74081 |
26.99 |
| 2026-06-05 00:00 |
15:08:37.77 |
-09:22:58.7 |
HIP 74081 |
26.83 |
| 2026-06-05 12:00 |
15:08:27.47 |
-09:22:34.3 |
HIP 74081 |
26.92 |
| 2026-06-06 00:00 |
15:08:17.23 |
-09:22:10.5 |
HIP 74081 |
27.23 |
| 2026-06-06 12:00 |
15:08:07.05 |
-09:21:47.0 |
HIP 74081 |
27.78 |
| 2026-06-07 00:00 |
15:07:56.93 |
-09:21:24.1 |
HIP 73984 |
28.20 |
| 2026-06-07 12:00 |
15:07:46.88 |
-09:21:01.6 |
HIP 73906 |
26.79 |
| 2026-06-08 00:00 |
15:07:36.89 |
-09:20:39.7 |
HIP 73906 |
24.97 |
| 2026-06-08 12:00 |
15:07:26.96 |
-09:20:18.2 |
HIP 73906 |
23.28 |
| 2026-06-09 00:00 |
15:07:17.11 |
-09:19:57.2 |
HIP 73886 |
21.69 |
| 2026-06-09 12:00 |
15:07:07.32 |
-09:19:36.7 |
HIP 73886 |
19.97 |
| 2026-06-10 00:00 |
15:06:57.60 |
-09:19:16.7 |
HIP 73886 |
18.41 |
| 2026-06-10 12:00 |
15:06:47.95 |
-09:18:57.2 |
HIP 73886 |
17.07 |
| 2026-06-11 00:00 |
15:06:38.38 |
-09:18:38.1 |
HIP 73886 |
15.97 |
| 2026-06-11 12:00 |
15:06:28.87 |
-09:18:19.6 |
HIP 73886 |
15.17 |
| 2026-06-12 00:00 |
15:06:19.44 |
-09:18:01.7 |
HIP 73886 |
14.71 |
| 2026-06-12 12:00 |
15:06:10.08 |
-09:17:44.2 |
HIP 73886 |
14.61 |
| 2026-06-13 00:00 |
15:06:00.80 |
-09:17:27.2 |
HIP 73886 |
14.87 |
| 2026-06-13 12:00 |
15:05:51.60 |
-09:17:10.8 |
HIP 73886 |
15.45 |
| 2026-06-14 00:00 |
15:05:42.48 |
-09:16:54.8 |
HIP 73886 |
16.33 |
| 2026-06-14 12:00 |
15:05:33.43 |
-09:16:39.4 |
HIP 73886 |
17.44 |
| 2026-06-15 00:00 |
15:05:24.46 |
-09:16:24.6 |
HIP 73886 |
18.73 |
| 2026-06-15 12:00 |
15:05:15.58 |
-09:16:10.2 |
HIP 73743 |
20.06 |
| 2026-06-16 00:00 |
15:05:06.77 |
-09:15:56.4 |
HIP 73743 |
18.62 |
| 2026-06-16 12:00 |
15:04:58.05 |
-09:15:43.1 |
HIP 73701 |
17.10 |
| 2026-06-17 00:00 |
15:04:49.42 |
-09:15:30.4 |
HIP 73701 |
15.03 |
| 2026-06-17 12:00 |
15:04:40.87 |
-09:15:18.2 |
HIP 73701 |
13.01 |
| 2026-06-18 00:00 |
15:04:32.40 |
-09:15:06.5 |
HIP 73701 |
11.03 |
| 2026-06-18 12:00 |
15:04:24.02 |
-09:14:55.4 |
HIP 73701 |
9.13 |
| 2026-06-19 00:00 |
15:04:15.73 |
-09:14:44.8 |
HIP 73701 |
7.34 |
| 2026-06-19 12:00 |
15:04:07.53 |
-09:14:34.8 |
HIP 73701 |
5.74 |
| 2026-06-20 00:00 |
15:03:59.41 |
-09:14:25.3 |
HIP 73701 |
4.51 |
| 2026-06-20 12:00 |
15:03:51.39 |
-09:14:16.3 |
HIP 73701 |
3.96 |
| 2026-06-21 00:00 |
15:03:43.46 |
-09:14:07.9 |
HIP 73701 |
4.34 |
| 2026-06-21 12:00 |
15:03:35.61 |
-09:14:00.1 |
HIP 73701 |
5.42 |
| 2026-06-22 00:00 |
15:03:27.87 |
-09:13:52.8 |
HIP 73701 |
6.87 |