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) |
| 2026-03-26 00:00 |
22:02:34.10 |
-12:21:36.8 |
HIP 108821 |
9.08 |
| 2026-03-26 12:00 |
22:02:44.98 |
-12:20:48.1 |
HIP 108821 |
7.79 |
| 2026-03-27 00:00 |
22:02:55.81 |
-12:19:59.7 |
HIP 108821 |
7.38 |
| 2026-03-27 12:00 |
22:03:06.59 |
-12:19:11.5 |
HIP 108821 |
7.96 |
| 2026-03-28 00:00 |
22:03:17.32 |
-12:18:23.6 |
HIP 108821 |
9.34 |
| 2026-03-28 12:00 |
22:03:27.99 |
-12:17:35.9 |
HIP 108821 |
11.22 |
| 2026-03-29 00:00 |
22:03:38.62 |
-12:16:48.5 |
HIP 108821 |
13.39 |
| 2026-03-29 12:00 |
22:03:49.20 |
-12:16:01.4 |
HIP 108821 |
15.71 |
| 2026-03-30 00:00 |
22:03:59.72 |
-12:15:14.5 |
HIP 108821 |
18.13 |
| 2026-03-30 12:00 |
22:04:10.19 |
-12:14:28.0 |
HIP 108821 |
20.60 |
| 2026-03-31 00:00 |
22:04:20.61 |
-12:13:41.6 |
HIP 108821 |
23.11 |
| 2026-03-31 12:00 |
22:04:30.97 |
-12:12:55.6 |
HIP 108821 |
25.63 |
| 2026-04-01 00:00 |
22:04:41.28 |
-12:12:09.9 |
HIP 109084 |
24.39 |
| 2026-04-01 12:00 |
22:04:51.54 |
-12:11:24.4 |
HIP 109084 |
22.13 |
| 2026-04-02 00:00 |
22:05:01.74 |
-12:10:39.2 |
HIP 109084 |
19.96 |
| 2026-04-02 12:00 |
22:05:11.88 |
-12:09:54.3 |
HIP 109084 |
17.92 |
| 2026-04-03 00:00 |
22:05:21.97 |
-12:09:09.7 |
HIP 109084 |
16.05 |
| 2026-04-03 12:00 |
22:05:32.01 |
-12:08:25.4 |
HIP 109084 |
14.41 |
| 2026-04-04 00:00 |
22:05:41.98 |
-12:07:41.4 |
HIP 109084 |
13.07 |
| 2026-04-04 12:00 |
22:05:51.91 |
-12:06:57.7 |
HIP 109084 |
12.14 |
| 2026-04-05 00:00 |
22:06:01.77 |
-12:06:14.3 |
HIP 109084 |
11.69 |
| 2026-04-05 12:00 |
22:06:11.57 |
-12:05:31.2 |
HIP 109084 |
11.77 |
| 2026-04-06 00:00 |
22:06:21.32 |
-12:04:48.4 |
HIP 109084 |
12.37 |
| 2026-04-06 12:00 |
22:06:31.01 |
-12:04:05.9 |
HIP 109084 |
13.40 |
| 2026-04-07 00:00 |
22:06:40.64 |
-12:03:23.8 |
HIP 109084 |
14.77 |
| 2026-04-07 12:00 |
22:06:50.21 |
-12:02:41.9 |
HIP 109084 |
16.38 |
| 2026-04-08 00:00 |
22:06:59.72 |
-12:02:00.4 |
HIP 109084 |
18.17 |
| 2026-04-08 12:00 |
22:07:09.16 |
-12:01:19.2 |
HIP 109084 |
20.08 |
| 2026-04-09 00:00 |
22:07:18.55 |
-12:00:38.4 |
HIP 109084 |
22.08 |
| 2026-04-09 12:00 |
22:07:27.88 |
-11:59:57.9 |
HIP 109084 |
24.14 |
| 2026-04-10 00:00 |
22:07:37.14 |
-11:59:17.7 |
HIP 109084 |
26.23 |
| 2026-04-10 12:00 |
22:07:46.34 |
-11:58:37.8 |
HIP 109298 |
24.76 |
| 2026-04-11 00:00 |
22:07:55.48 |
-11:57:58.3 |
HIP 109298 |
23.18 |
| 2026-04-11 12:00 |
22:08:04.55 |
-11:57:19.2 |
HIP 109298 |
21.75 |
| 2026-04-12 00:00 |
22:08:13.56 |
-11:56:40.4 |
HIP 109298 |
20.49 |
| 2026-04-12 12:00 |
22:08:22.50 |
-11:56:01.9 |
HIP 109298 |
19.43 |
| 2026-04-13 00:00 |
22:08:31.38 |
-11:55:23.8 |
HIP 109298 |
18.60 |
| 2026-04-13 12:00 |
22:08:40.20 |
-11:54:46.1 |
HIP 109298 |
18.02 |
| 2026-04-14 00:00 |
22:08:48.94 |
-11:54:08.7 |
HIP 109298 |
17.71 |
| 2026-04-14 12:00 |
22:08:57.62 |
-11:53:31.7 |
HIP 109298 |
17.68 |
| 2026-04-15 00:00 |
22:09:06.24 |
-11:52:55.1 |
HIP 109298 |
17.92 |
| 2026-04-15 12:00 |
22:09:14.78 |
-11:52:18.9 |
HIP 109298 |
18.42 |
| 2026-04-16 00:00 |
22:09:23.26 |
-11:51:43.0 |
HIP 109298 |
19.15 |