메타데이터
| 항목 |
값 |
| Designation |
311P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-07-10T16:19:53.999040Z |
| Orbit solution date (soln_date, UTC) |
2025-05-08T09:42:30Z |
| Obs used |
272 |
| NEO |
- |
| M1 |
19.000 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2017-04-29.0000000 |
| e |
0.11566755 |
| q (au) |
1.935566 |
| a (au) |
2.188731 |
| i (deg) |
4.966451 |
| Ω (om, deg) |
279.259757 |
| ω (w, deg) |
143.998566 |
| M (ma, deg) |
337.877546 |
밝기
산란 + 전체 선형
$$
M_a = (19.434 + 2.034\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
19.434 |
| n |
2.034 |
| gf |
0.800 |
| gb |
-0.702 |
| k |
0.976 |
| δ90 |
1.000 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
22:35:07.34 |
-06:03:32.4 |
HIP 111668 |
32.46 |
| 2026-05-12 12:00 |
22:35:49.65 |
-05:58:16.3 |
HIP 111668 |
22.69 |
| 2026-05-13 00:00 |
22:36:31.83 |
-05:53:00.4 |
HIP 111668 |
15.91 |
| 2026-05-13 12:00 |
22:37:13.87 |
-05:47:44.5 |
HIP 111668 |
16.33 |
| 2026-05-14 00:00 |
22:37:55.77 |
-05:42:28.8 |
HIP 111792 |
14.39 |
| 2026-05-14 12:00 |
22:38:37.54 |
-05:37:13.2 |
HIP 111792 |
15.66 |
| 2026-05-15 00:00 |
22:39:19.16 |
-05:31:57.8 |
HIP 111792 |
23.53 |
| 2026-05-15 12:00 |
22:40:00.64 |
-05:26:42.5 |
HIP 112019 |
24.38 |
| 2026-05-16 00:00 |
22:40:41.98 |
-05:21:27.4 |
HIP 112019 |
20.76 |
| 2026-05-16 12:00 |
22:41:23.17 |
-05:16:12.5 |
HIP 112078 |
14.68 |
| 2026-05-17 00:00 |
22:42:04.22 |
-05:10:57.7 |
HIP 112078 |
4.87 |
| 2026-05-17 12:00 |
22:42:45.12 |
-05:05:43.2 |
HIP 112135 |
6.07 |
| 2026-05-18 00:00 |
22:43:25.87 |
-05:00:28.9 |
HIP 112135 |
8.46 |
| 2026-05-18 12:00 |
22:44:06.48 |
-04:55:14.8 |
HIP 112309 |
11.95 |
| 2026-05-19 00:00 |
22:44:46.93 |
-04:50:01.0 |
HIP 112309 |
5.27 |
| 2026-05-19 12:00 |
22:45:27.24 |
-04:44:47.4 |
HIP 112309 |
13.03 |
| 2026-05-20 00:00 |
22:46:07.39 |
-04:39:34.0 |
HIP 112309 |
23.81 |
| 2026-05-20 12:00 |
22:46:47.40 |
-04:34:21.0 |
HIP 112617 |
25.74 |
| 2026-05-21 00:00 |
22:47:27.25 |
-04:29:08.2 |
HIP 112559 |
16.47 |
| 2026-05-21 12:00 |
22:48:06.94 |
-04:23:55.6 |
HIP 112559 |
11.04 |
| 2026-05-22 00:00 |
22:48:46.48 |
-04:18:43.4 |
HIP 112559 |
14.88 |
| 2026-05-22 12:00 |
22:49:25.87 |
-04:13:31.5 |
HIP 112559 |
23.83 |
| 2026-05-23 00:00 |
22:50:05.10 |
-04:08:19.8 |
HIP 112559 |
34.04 |
| 2026-05-23 12:00 |
22:50:44.18 |
-04:03:08.5 |
HIP 112559 |
44.62 |
| 2026-05-24 00:00 |
22:51:23.09 |
-03:57:57.5 |
HIP 112866 |
43.86 |
| 2026-05-24 12:00 |
22:52:01.85 |
-03:52:46.8 |
HIP 112866 |
39.88 |
| 2026-05-25 00:00 |
22:52:40.45 |
-03:47:36.5 |
HIP 112866 |
38.69 |
| 2026-05-25 12:00 |
22:53:18.89 |
-03:42:26.6 |
HIP 112866 |
40.50 |
| 2026-05-26 00:00 |
22:53:57.16 |
-03:37:16.9 |
HIP 113303 |
41.84 |
| 2026-05-26 12:00 |
22:54:35.28 |
-03:32:07.7 |
HIP 113303 |
31.95 |
| 2026-05-27 00:00 |
22:55:13.23 |
-03:26:58.8 |
HIP 113303 |
22.95 |
| 2026-05-27 12:00 |
22:55:51.01 |
-03:21:50.3 |
HIP 113303 |
16.31 |
| 2026-05-28 00:00 |
22:56:28.63 |
-03:16:42.2 |
HIP 113331 |
9.74 |
| 2026-05-28 12:00 |
22:57:06.09 |
-03:11:34.5 |
HIP 113331 |
3.15 |
| 2026-05-29 00:00 |
22:57:43.37 |
-03:06:27.3 |
HIP 113355 |
5.28 |
| 2026-05-29 12:00 |
22:58:20.49 |
-03:01:20.4 |
HIP 113355 |
15.85 |
| 2026-05-30 00:00 |
22:58:57.44 |
-02:56:14.0 |
HIP 113523 |
8.52 |
| 2026-05-30 12:00 |
22:59:34.22 |
-02:51:08.0 |
HIP 113523 |
2.35 |
| 2026-05-31 00:00 |
23:00:10.82 |
-02:46:02.5 |
HIP 113555 |
6.13 |
| 2026-05-31 12:00 |
23:00:47.25 |
-02:40:57.4 |
HIP 113555 |
15.96 |
| 2026-06-01 00:00 |
23:01:23.50 |
-02:35:52.8 |
HIP 113727 |
9.56 |
| 2026-06-01 12:00 |
23:01:59.58 |
-02:30:48.7 |
HIP 113727 |
10.40 |
| 2026-06-02 00:00 |
23:02:35.48 |
-02:25:45.1 |
HIP 113727 |
18.38 |