메타데이터
| 항목 |
값 |
| Designation |
P/2017 U3 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-04-21T20:05:53.658240Z |
| Orbit solution date (soln_date, UTC) |
2022-05-19T21:13:39Z |
| Obs used |
73 |
| NEO |
- |
| M1 |
14.700 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2017-08-27.0000000 |
| e |
0.09998087 |
| q (au) |
4.443406 |
| a (au) |
4.937013 |
| i (deg) |
15.908436 |
| Ω (om, deg) |
165.150002 |
| ω (w, deg) |
297.458320 |
| M (ma, deg) |
305.836360 |
밝기
산란 + 전체 선형
$$
M_a = (15.774 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.774 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.580 |
| k |
0.800 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
21:59:13.80 |
-06:40:54.3 |
HIP 108574 |
25.27 |
| 2026-03-26 12:00 |
21:59:36.90 |
-06:39:06.0 |
HIP 108574 |
22.68 |
| 2026-03-27 00:00 |
21:59:59.95 |
-06:37:17.7 |
HIP 108574 |
21.52 |
| 2026-03-27 12:00 |
22:00:22.92 |
-06:35:29.6 |
HIP 108574 |
21.98 |
| 2026-03-28 00:00 |
22:00:45.83 |
-06:33:41.6 |
HIP 108574 |
23.96 |
| 2026-03-28 12:00 |
22:01:08.68 |
-06:31:53.7 |
HIP 108735 |
20.24 |
| 2026-03-29 00:00 |
22:01:31.46 |
-06:30:06.0 |
HIP 108735 |
17.35 |
| 2026-03-29 12:00 |
22:01:54.17 |
-06:28:18.3 |
HIP 108735 |
16.21 |
| 2026-03-30 00:00 |
22:02:16.81 |
-06:26:30.8 |
HIP 108868 |
15.58 |
| 2026-03-30 12:00 |
22:02:39.39 |
-06:24:43.4 |
HIP 108868 |
11.34 |
| 2026-03-31 00:00 |
22:03:01.90 |
-06:22:56.2 |
HIP 108868 |
9.15 |
| 2026-03-31 12:00 |
22:03:24.34 |
-06:21:09.1 |
HIP 108868 |
10.38 |
| 2026-04-01 00:00 |
22:03:46.71 |
-06:19:22.2 |
HIP 108868 |
14.14 |
| 2026-04-01 12:00 |
22:04:09.01 |
-06:17:35.4 |
HIP 109008 |
13.52 |
| 2026-04-02 00:00 |
22:04:31.24 |
-06:15:48.8 |
HIP 109008 |
8.32 |
| 2026-04-02 12:00 |
22:04:53.40 |
-06:14:02.4 |
HIP 109008 |
4.80 |
| 2026-04-03 00:00 |
22:05:15.49 |
-06:12:16.1 |
HIP 109008 |
6.61 |
| 2026-04-03 12:00 |
22:05:37.50 |
-06:10:30.0 |
HIP 109008 |
11.43 |
| 2026-04-04 00:00 |
22:05:59.44 |
-06:08:44.1 |
HIP 109008 |
16.82 |
| 2026-04-04 12:00 |
22:06:21.31 |
-06:06:58.4 |
HIP 109008 |
22.37 |
| 2026-04-05 00:00 |
22:06:43.11 |
-06:05:12.9 |
HIP 109229 |
21.25 |
| 2026-04-05 12:00 |
22:07:04.83 |
-06:03:27.5 |
HIP 109229 |
16.50 |
| 2026-04-06 00:00 |
22:07:26.47 |
-06:01:42.4 |
HIP 109229 |
12.56 |
| 2026-04-06 12:00 |
22:07:48.04 |
-05:59:57.5 |
HIP 109229 |
10.36 |
| 2026-04-07 00:00 |
22:08:09.53 |
-05:58:12.8 |
HIP 109229 |
10.97 |
| 2026-04-07 12:00 |
22:08:30.95 |
-05:56:28.4 |
HIP 109229 |
14.00 |
| 2026-04-08 00:00 |
22:08:52.29 |
-05:54:44.2 |
HIP 109229 |
18.28 |
| 2026-04-08 12:00 |
22:09:13.55 |
-05:53:00.2 |
HIP 109229 |
23.10 |
| 2026-04-09 00:00 |
22:09:34.73 |
-05:51:16.4 |
HIP 109526 |
24.24 |
| 2026-04-09 12:00 |
22:09:55.83 |
-05:49:32.9 |
HIP 109526 |
19.31 |
| 2026-04-10 00:00 |
22:10:16.85 |
-05:47:49.7 |
HIP 109526 |
14.83 |
| 2026-04-10 12:00 |
22:10:37.79 |
-05:46:06.7 |
HIP 109526 |
11.30 |
| 2026-04-11 00:00 |
22:10:58.65 |
-05:44:24.0 |
HIP 109526 |
9.78 |
| 2026-04-11 12:00 |
22:11:19.42 |
-05:42:41.5 |
HIP 109526 |
11.10 |
| 2026-04-12 00:00 |
22:11:40.11 |
-05:40:59.4 |
HIP 109526 |
14.47 |
| 2026-04-12 12:00 |
22:12:00.72 |
-05:39:17.5 |
HIP 109526 |
18.81 |
| 2026-04-13 00:00 |
22:12:21.25 |
-05:37:35.9 |
HIP 109526 |
23.57 |
| 2026-04-13 12:00 |
22:12:41.69 |
-05:35:54.6 |
HIP 109791 |
24.42 |
| 2026-04-14 00:00 |
22:13:02.04 |
-05:34:13.7 |
HIP 109791 |
19.25 |
| 2026-04-14 12:00 |
22:13:22.30 |
-05:32:33.0 |
HIP 109791 |
14.23 |
| 2026-04-15 00:00 |
22:13:42.48 |
-05:30:52.7 |
HIP 109791 |
9.55 |
| 2026-04-15 12:00 |
22:14:02.57 |
-05:29:12.6 |
HIP 109791 |
6.00 |
| 2026-04-16 00:00 |
22:14:22.57 |
-05:27:33.0 |
HIP 109791 |
6.03 |