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) |
| 2026-06-01 00:00 |
22:37:14.07 |
-03:32:59.0 |
HIP 111840 |
30.51 |
| 2026-06-01 12:00 |
22:37:22.92 |
-03:32:18.8 |
HIP 111840 |
28.41 |
| 2026-06-02 00:00 |
22:37:31.62 |
-03:31:39.5 |
HIP 111840 |
26.38 |
| 2026-06-02 12:00 |
22:37:40.16 |
-03:31:01.2 |
HIP 111840 |
24.42 |
| 2026-06-03 00:00 |
22:37:48.56 |
-03:30:23.8 |
HIP 111840 |
22.54 |
| 2026-06-03 12:00 |
22:37:56.80 |
-03:29:47.4 |
HIP 111840 |
20.75 |
| 2026-06-04 00:00 |
22:38:04.89 |
-03:29:12.0 |
HIP 111840 |
19.07 |
| 2026-06-04 12:00 |
22:38:12.83 |
-03:28:37.5 |
HIP 111840 |
17.50 |
| 2026-06-05 00:00 |
22:38:20.61 |
-03:28:04.0 |
HIP 111840 |
16.07 |
| 2026-06-05 12:00 |
22:38:28.24 |
-03:27:31.5 |
HIP 111840 |
14.80 |
| 2026-06-06 00:00 |
22:38:35.72 |
-03:27:00.0 |
HIP 111840 |
13.71 |
| 2026-06-06 12:00 |
22:38:43.04 |
-03:26:29.5 |
HIP 111840 |
12.84 |
| 2026-06-07 00:00 |
22:38:50.20 |
-03:26:00.0 |
HIP 111840 |
12.21 |
| 2026-06-07 12:00 |
22:38:57.20 |
-03:25:31.6 |
HIP 111840 |
11.84 |
| 2026-06-08 00:00 |
22:39:04.05 |
-03:25:04.1 |
HIP 111840 |
11.73 |
| 2026-06-08 12:00 |
22:39:10.74 |
-03:24:37.7 |
HIP 111840 |
11.88 |
| 2026-06-09 00:00 |
22:39:17.27 |
-03:24:12.3 |
HIP 111840 |
12.25 |
| 2026-06-09 12:00 |
22:39:23.64 |
-03:23:47.9 |
HIP 111840 |
12.80 |
| 2026-06-10 00:00 |
22:39:29.86 |
-03:23:24.6 |
HIP 111840 |
13.51 |
| 2026-06-10 12:00 |
22:39:35.91 |
-03:23:02.4 |
HIP 111840 |
14.33 |
| 2026-06-11 00:00 |
22:39:41.80 |
-03:22:41.2 |
HIP 111840 |
15.23 |
| 2026-06-11 12:00 |
22:39:47.52 |
-03:22:21.1 |
HIP 111840 |
16.19 |
| 2026-06-12 00:00 |
22:39:53.09 |
-03:22:02.0 |
HIP 111840 |
17.18 |
| 2026-06-12 12:00 |
22:39:58.49 |
-03:21:44.1 |
HIP 111965 |
16.88 |
| 2026-06-13 00:00 |
22:40:03.73 |
-03:21:27.2 |
HIP 111965 |
16.15 |
| 2026-06-13 12:00 |
22:40:08.80 |
-03:21:11.4 |
HIP 111965 |
15.52 |
| 2026-06-14 00:00 |
22:40:13.71 |
-03:20:56.7 |
HIP 111965 |
14.98 |
| 2026-06-14 12:00 |
22:40:18.46 |
-03:20:43.2 |
HIP 111965 |
14.53 |
| 2026-06-15 00:00 |
22:40:23.04 |
-03:20:30.7 |
HIP 111965 |
14.17 |
| 2026-06-15 12:00 |
22:40:27.45 |
-03:20:19.3 |
HIP 111965 |
13.90 |
| 2026-06-16 00:00 |
22:40:31.70 |
-03:20:09.1 |
HIP 111965 |
13.71 |
| 2026-06-16 12:00 |
22:40:35.78 |
-03:20:00.0 |
HIP 111965 |
13.59 |
| 2026-06-17 00:00 |
22:40:39.69 |
-03:19:52.0 |
HIP 111965 |
13.54 |
| 2026-06-17 12:00 |
22:40:43.44 |
-03:19:45.2 |
HIP 111965 |
13.54 |
| 2026-06-18 00:00 |
22:40:47.01 |
-03:19:39.5 |
HIP 111965 |
13.59 |
| 2026-06-18 12:00 |
22:40:50.43 |
-03:19:34.9 |
HIP 111965 |
13.68 |
| 2026-06-19 00:00 |
22:40:53.67 |
-03:19:31.5 |
HIP 111965 |
13.80 |
| 2026-06-19 12:00 |
22:40:56.74 |
-03:19:29.2 |
HIP 111965 |
13.93 |
| 2026-06-20 00:00 |
22:40:59.65 |
-03:19:28.1 |
HIP 111965 |
14.08 |
| 2026-06-20 12:00 |
22:41:02.39 |
-03:19:28.2 |
HIP 111965 |
14.24 |
| 2026-06-21 00:00 |
22:41:04.96 |
-03:19:29.4 |
HIP 111965 |
14.40 |
| 2026-06-21 12:00 |
22:41:07.36 |
-03:19:31.7 |
HIP 111965 |
14.55 |
| 2026-06-22 00:00 |
22:41:09.60 |
-03:19:35.3 |
HIP 111965 |
14.69 |