P/2018 H2 (PANSTARRS)
메타데이터
| 항목 |
값 |
| Designation |
P/2018 H2 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-01-23T11:01:35.495040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:43Z |
| Obs used |
169 |
| NEO |
- |
| M1 |
17.000 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2018-04-16T12:40:08.832000Z |
| Discovery magnitude (MPC) |
19.90 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2018-04-26.0000000 |
| e |
0.54004634 |
| q (au) |
2.027090 |
| a (au) |
4.407161 |
| i (deg) |
7.388853 |
| Ω (om, deg) |
68.455880 |
| ω (w, deg) |
120.229629 |
| M (ma, deg) |
9.858205 |
밝기
산란 + 전체 선형
$$
M_a = (18.665 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
18.665 |
| n |
2.000 |
| gf |
0.987 |
| gb |
-0.786 |
| k |
0.943 |
| δ90 |
5.365 |
| 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) |
| 2026-02-03 00:00 |
04:13:48.22 |
+23:04:40.2 |
HIP 19702 |
10.63 |
| 2026-02-03 12:00 |
04:13:48.10 |
+23:04:59.1 |
HIP 19702 |
10.82 |
| 2026-02-04 00:00 |
04:13:48.30 |
+23:05:18.8 |
HIP 19702 |
11.08 |
| 2026-02-04 12:00 |
04:13:48.81 |
+23:05:39.1 |
HIP 19702 |
11.41 |
| 2026-02-05 00:00 |
04:13:49.63 |
+23:06:00.1 |
HIP 19702 |
11.79 |
| 2026-02-05 12:00 |
04:13:50.77 |
+23:06:21.7 |
HIP 19702 |
12.23 |
| 2026-02-06 00:00 |
04:13:52.23 |
+23:06:44.1 |
HIP 19702 |
12.73 |
| 2026-02-06 12:00 |
04:13:53.99 |
+23:07:07.1 |
HIP 19702 |
13.29 |
| 2026-02-07 00:00 |
04:13:56.07 |
+23:07:30.8 |
HIP 19702 |
13.91 |
| 2026-02-07 12:00 |
04:13:58.46 |
+23:07:55.1 |
HIP 19702 |
14.58 |
| 2026-02-08 00:00 |
04:14:01.17 |
+23:08:20.2 |
HIP 19702 |
15.31 |
| 2026-02-08 12:00 |
04:14:04.18 |
+23:08:45.9 |
HIP 19702 |
16.11 |
| 2026-02-09 00:00 |
04:14:07.51 |
+23:09:12.3 |
HIP 19702 |
16.96 |
| 2026-02-09 12:00 |
04:14:11.15 |
+23:09:39.3 |
HIP 19702 |
17.88 |
| 2026-02-10 00:00 |
04:14:15.09 |
+23:10:07.0 |
HIP 19702 |
18.87 |
| 2026-02-10 12:00 |
04:14:19.35 |
+23:10:35.4 |
HIP 19702 |
19.91 |
| 2026-02-11 00:00 |
04:14:23.92 |
+23:11:04.5 |
HIP 19702 |
21.03 |
| 2026-02-11 12:00 |
04:14:28.79 |
+23:11:34.2 |
HIP 19702 |
22.20 |
| 2026-02-12 00:00 |
04:14:33.98 |
+23:12:04.6 |
HIP 19793 |
22.43 |
| 2026-02-12 12:00 |
04:14:39.47 |
+23:12:35.6 |
HIP 19793 |
21.97 |
| 2026-02-13 00:00 |
04:14:45.26 |
+23:13:07.3 |
HIP 19793 |
21.59 |
| 2026-02-13 12:00 |
04:14:51.37 |
+23:13:39.7 |
HIP 19793 |
21.30 |
| 2026-02-14 00:00 |
04:14:57.78 |
+23:14:12.7 |
HIP 19793 |
21.12 |
| 2026-02-14 12:00 |
04:15:04.49 |
+23:14:46.4 |
HIP 19793 |
21.07 |
| 2026-02-15 00:00 |
04:15:11.51 |
+23:15:20.7 |
HIP 19793 |
21.17 |
| 2026-02-15 12:00 |
04:15:18.83 |
+23:15:55.7 |
HIP 19793 |
21.43 |
| 2026-02-16 00:00 |
04:15:26.46 |
+23:16:31.3 |
HIP 19793 |
21.86 |
| 2026-02-16 12:00 |
04:15:34.38 |
+23:17:07.5 |
HIP 19793 |
22.48 |
| 2026-02-17 00:00 |
04:15:42.61 |
+23:17:44.4 |
HIP 19793 |
23.27 |
| 2026-02-17 12:00 |
04:15:51.13 |
+23:18:21.9 |
HIP 20012 |
24.21 |
| 2026-02-18 00:00 |
04:15:59.96 |
+23:19:00.0 |
HIP 20012 |
22.10 |
| 2026-02-18 12:00 |
04:16:09.08 |
+23:19:38.8 |
HIP 20012 |
19.93 |
| 2026-02-19 00:00 |
04:16:18.50 |
+23:20:18.1 |
HIP 20012 |
17.70 |
| 2026-02-19 12:00 |
04:16:28.22 |
+23:20:58.1 |
HIP 20012 |
15.41 |
| 2026-02-20 00:00 |
04:16:38.23 |
+23:21:38.7 |
HIP 20012 |
13.07 |
| 2026-02-20 12:00 |
04:16:48.53 |
+23:22:19.9 |
HIP 20012 |
10.69 |
| 2026-02-21 00:00 |
04:16:59.13 |
+23:23:01.7 |
HIP 20012 |
8.31 |
| 2026-02-21 12:00 |
04:17:10.02 |
+23:23:44.1 |
HIP 20012 |
5.99 |
| 2026-02-22 00:00 |
04:17:21.19 |
+23:24:27.1 |
HIP 20012 |
3.98 |
| 2026-02-22 12:00 |
04:17:32.66 |
+23:25:10.6 |
HIP 20012 |
3.19 |
| 2026-02-23 00:00 |
04:17:44.41 |
+23:25:54.7 |
HIP 20012 |
4.45 |
| 2026-02-23 12:00 |
04:17:56.46 |
+23:26:39.4 |
HIP 20012 |
6.77 |
| 2026-02-24 00:00 |
04:18:08.78 |
+23:27:24.7 |
HIP 20012 |
9.46 |