409P/LONEOS-Hill
메타데이터
| 항목 |
값 |
| Designation |
409P/LONEOS-Hill |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-01-25T16:59:38.414400Z |
| Orbit solution date (soln_date, UTC) |
2022-03-08T19:44:12Z |
| Obs used |
1705 |
| NEO |
- |
| M1 |
14.200 |
| K1 |
8.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-11-03T11:40:07.680000Z |
| Discovery magnitude (MPC) |
19.56 g |
| Discovery observatory (MPC) |
I41 · Palomar Mountain–ZTF |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2014-06-28.0000000 |
| e |
0.71072113 |
| q (au) |
1.751020 |
| a (au) |
6.053052 |
| i (deg) |
17.144587 |
| Ω (om, deg) |
143.781749 |
| ω (w, deg) |
15.044814 |
| M (ma, deg) |
200.916834 |
밝기
산란 + 전체 선형
$$
M_a = (14.371 + 4.559\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.371 |
| n |
4.559 |
| gf |
1.000 |
| gb |
-0.608 |
| k |
0.800 |
| δ90 |
1.739 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2019-10-24 |
2020-11-05 |
-7.0401 |
+2.913 |
| 2020-11-05 |
2021-01-24 |
+19.2516 |
-4.902 |
| 2021-01-26 |
2021-07-05 |
+4.7721 |
-1.442 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
21:41:22.72 |
-13:55:56.5 |
HIP 107082 |
0.65 |
| 2026-02-03 12:00 |
21:41:35.78 |
-13:55:00.1 |
HIP 107082 |
3.96 |
| 2026-02-04 00:00 |
21:41:48.85 |
-13:54:03.7 |
HIP 107082 |
7.26 |
| 2026-02-04 12:00 |
21:42:01.93 |
-13:53:07.1 |
HIP 107082 |
10.57 |
| 2026-02-05 00:00 |
21:42:15.01 |
-13:52:10.5 |
HIP 107082 |
13.89 |
| 2026-02-05 12:00 |
21:42:28.10 |
-13:51:13.8 |
HIP 107220 |
13.18 |
| 2026-02-06 00:00 |
21:42:41.19 |
-13:50:17.0 |
HIP 107220 |
10.80 |
| 2026-02-06 12:00 |
21:42:54.29 |
-13:49:20.1 |
HIP 107220 |
9.03 |
| 2026-02-07 00:00 |
21:43:07.40 |
-13:48:23.2 |
HIP 107220 |
8.28 |
| 2026-02-07 12:00 |
21:43:20.50 |
-13:47:26.1 |
HIP 107220 |
8.80 |
| 2026-02-08 00:00 |
21:43:33.61 |
-13:46:29.0 |
HIP 107220 |
10.42 |
| 2026-02-08 12:00 |
21:43:46.72 |
-13:45:31.9 |
HIP 107220 |
12.72 |
| 2026-02-09 00:00 |
21:43:59.83 |
-13:44:34.7 |
HIP 107220 |
15.39 |
| 2026-02-09 12:00 |
21:44:12.95 |
-13:43:37.4 |
HIP 107404 |
15.83 |
| 2026-02-10 00:00 |
21:44:26.06 |
-13:42:40.1 |
HIP 107404 |
12.54 |
| 2026-02-10 12:00 |
21:44:39.18 |
-13:41:42.7 |
HIP 107404 |
9.26 |
| 2026-02-11 00:00 |
21:44:52.29 |
-13:40:45.3 |
HIP 107404 |
6.04 |
| 2026-02-11 12:00 |
21:45:05.41 |
-13:39:47.8 |
HIP 107404 |
3.05 |
| 2026-02-12 00:00 |
21:45:18.52 |
-13:38:50.3 |
HIP 107407 |
1.72 |
| 2026-02-12 12:00 |
21:45:31.63 |
-13:37:52.7 |
HIP 107422 |
0.97 |
| 2026-02-13 00:00 |
21:45:44.73 |
-13:36:55.1 |
HIP 107422 |
4.22 |
| 2026-02-13 12:00 |
21:45:57.84 |
-13:35:57.5 |
HIP 107422 |
7.54 |
| 2026-02-14 00:00 |
21:46:10.94 |
-13:34:59.8 |
HIP 107422 |
10.86 |
| 2026-02-14 12:00 |
21:46:24.03 |
-13:34:02.1 |
HIP 107422 |
14.18 |
| 2026-02-15 00:00 |
21:46:37.12 |
-13:33:04.4 |
HIP 107422 |
17.51 |
| 2026-02-15 12:00 |
21:46:50.20 |
-13:32:06.7 |
HIP 107422 |
20.83 |
| 2026-02-16 00:00 |
21:47:03.28 |
-13:31:08.9 |
HIP 107422 |
24.15 |
| 2026-02-16 12:00 |
21:47:16.34 |
-13:30:11.2 |
HIP 107588 |
23.03 |
| 2026-02-17 00:00 |
21:47:29.41 |
-13:29:13.4 |
HIP 107588 |
21.93 |
| 2026-02-17 12:00 |
21:47:42.46 |
-13:28:15.7 |
HIP 107588 |
21.31 |
| 2026-02-18 00:00 |
21:47:55.50 |
-13:27:17.9 |
HIP 107588 |
21.18 |
| 2026-02-18 12:00 |
21:48:08.53 |
-13:26:20.2 |
HIP 107735 |
21.25 |
| 2026-02-19 00:00 |
21:48:21.56 |
-13:25:22.4 |
HIP 107735 |
18.96 |
| 2026-02-19 12:00 |
21:48:34.57 |
-13:24:24.7 |
HIP 107735 |
17.02 |
| 2026-02-20 00:00 |
21:48:47.57 |
-13:23:26.9 |
HIP 107735 |
15.54 |
| 2026-02-20 12:00 |
21:49:00.55 |
-13:22:29.2 |
HIP 107735 |
14.67 |
| 2026-02-21 00:00 |
21:49:13.53 |
-13:21:31.5 |
HIP 107735 |
14.51 |
| 2026-02-21 12:00 |
21:49:26.49 |
-13:20:33.9 |
HIP 107735 |
15.09 |
| 2026-02-22 00:00 |
21:49:39.44 |
-13:19:36.2 |
HIP 107735 |
16.33 |
| 2026-02-22 12:00 |
21:49:52.37 |
-13:18:38.6 |
HIP 107735 |
18.09 |
| 2026-02-23 00:00 |
21:50:05.28 |
-13:17:41.1 |
HIP 107735 |
20.23 |
| 2026-02-23 12:00 |
21:50:18.19 |
-13:16:43.5 |
HIP 107735 |
22.64 |
| 2026-02-24 00:00 |
21:50:31.07 |
-13:15:46.1 |
HIP 107889 |
20.80 |