메타데이터
| 항목 |
값 |
| Designation |
P/2019 LD2 (ATLAS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2020-04-09T09:51:48.663360Z |
| Orbit solution date (soln_date, UTC) |
2026-05-28T12:12:21Z |
| Obs used |
770 |
| NEO |
- |
| M1 |
7.000 |
| K1 |
13.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-09-29.0000000 |
| e |
0.13350136 |
| q (au) |
4.577933 |
| a (au) |
5.283255 |
| i (deg) |
11.568661 |
| Ω (om, deg) |
179.662369 |
| ω (w, deg) |
123.425509 |
| M (ma, deg) |
14.007637 |
밝기
산란 + 전체 선형
$$
M_a = (4.119 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
4.119 |
| n |
6.000 |
| gf |
0.999 |
| gb |
-0.500 |
| k |
1.000 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
08:40:37.64 |
+10:42:28.2 |
HIP 42560 |
13.04 |
| 2026-07-29 12:00 |
08:41:01.22 |
+10:41:11.8 |
HIP 42560 |
15.90 |
| 2026-07-30 00:00 |
08:41:24.80 |
+10:39:55.0 |
HIP 42704 |
17.64 |
| 2026-07-30 12:00 |
08:41:48.37 |
+10:38:37.7 |
HIP 42704 |
13.47 |
| 2026-07-31 00:00 |
08:42:11.95 |
+10:37:20.1 |
HIP 42704 |
11.03 |
| 2026-07-31 12:00 |
08:42:35.52 |
+10:36:02.0 |
HIP 42704 |
11.51 |
| 2026-08-01 00:00 |
08:42:59.09 |
+10:34:43.6 |
HIP 42704 |
14.61 |
| 2026-08-01 12:00 |
08:43:22.65 |
+10:33:24.8 |
HIP 42704 |
19.11 |
| 2026-08-02 00:00 |
08:43:46.22 |
+10:32:05.5 |
HIP 42704 |
24.23 |
| 2026-08-02 12:00 |
08:44:09.77 |
+10:30:45.9 |
HIP 42917 |
27.28 |
| 2026-08-03 00:00 |
08:44:33.32 |
+10:29:26.0 |
HIP 42917 |
24.70 |
| 2026-08-03 12:00 |
08:44:56.87 |
+10:28:05.6 |
HIP 43074 |
22.79 |
| 2026-08-04 00:00 |
08:45:20.41 |
+10:26:44.8 |
HIP 43074 |
18.04 |
| 2026-08-04 12:00 |
08:45:43.94 |
+10:25:23.7 |
HIP 43074 |
14.22 |
| 2026-08-05 00:00 |
08:46:07.46 |
+10:24:02.2 |
HIP 43074 |
12.23 |
| 2026-08-05 12:00 |
08:46:30.98 |
+10:22:40.3 |
HIP 43074 |
12.95 |
| 2026-08-06 00:00 |
08:46:54.49 |
+10:21:18.1 |
HIP 43074 |
16.02 |
| 2026-08-06 12:00 |
08:47:17.99 |
+10:19:55.5 |
HIP 43245 |
20.36 |
| 2026-08-07 00:00 |
08:47:41.48 |
+10:18:32.5 |
HIP 43245 |
15.56 |
| 2026-08-07 12:00 |
08:48:04.96 |
+10:17:09.1 |
HIP 43245 |
11.84 |
| 2026-08-08 00:00 |
08:48:28.43 |
+10:15:45.4 |
HIP 43245 |
10.44 |
| 2026-08-08 12:00 |
08:48:51.89 |
+10:14:21.4 |
HIP 43245 |
12.18 |
| 2026-08-09 00:00 |
08:49:15.33 |
+10:12:57.0 |
HIP 43245 |
16.08 |
| 2026-08-09 12:00 |
08:49:38.77 |
+10:11:32.2 |
HIP 43245 |
20.96 |
| 2026-08-10 00:00 |
08:50:02.19 |
+10:10:07.1 |
HIP 43245 |
26.27 |
| 2026-08-10 12:00 |
08:50:25.59 |
+10:08:41.7 |
HIP 43245 |
31.81 |
| 2026-08-11 00:00 |
08:50:48.98 |
+10:07:15.9 |
HIP 43631 |
34.42 |
| 2026-08-11 12:00 |
08:51:12.36 |
+10:05:49.8 |
HIP 43631 |
28.80 |
| 2026-08-12 00:00 |
08:51:35.72 |
+10:04:23.3 |
HIP 43631 |
23.32 |
| 2026-08-12 12:00 |
08:51:59.06 |
+10:02:56.6 |
HIP 43631 |
18.14 |
| 2026-08-13 00:00 |
08:52:22.39 |
+10:01:29.5 |
HIP 43631 |
13.58 |
| 2026-08-13 12:00 |
08:52:45.69 |
+10:00:02.0 |
HIP 43631 |
10.49 |
| 2026-08-14 00:00 |
08:53:08.98 |
+09:58:34.3 |
HIP 43631 |
10.30 |
| 2026-08-14 12:00 |
08:53:32.25 |
+09:57:06.3 |
HIP 43631 |
13.11 |
| 2026-08-15 00:00 |
08:53:55.50 |
+09:55:37.9 |
HIP 43631 |
17.55 |
| 2026-08-15 12:00 |
08:54:18.73 |
+09:54:09.3 |
HIP 43631 |
22.66 |
| 2026-08-16 00:00 |
08:54:41.93 |
+09:52:40.3 |
HIP 43631 |
28.09 |
| 2026-08-16 12:00 |
08:55:05.12 |
+09:51:11.0 |
HIP 43631 |
33.68 |
| 2026-08-17 00:00 |
08:55:28.28 |
+09:49:41.5 |
HIP 43631 |
39.35 |
| 2026-08-17 12:00 |
08:55:51.42 |
+09:48:11.7 |
HIP 44010 |
36.94 |
| 2026-08-18 00:00 |
08:56:14.53 |
+09:46:41.5 |
HIP 44010 |
31.84 |
| 2026-08-18 12:00 |
08:56:37.62 |
+09:45:11.1 |
HIP 44010 |
27.07 |
| 2026-08-19 00:00 |
08:57:00.68 |
+09:43:40.5 |
HIP 44010 |
22.81 |