메타데이터
| 항목 |
값 |
| Designation |
P/2019 LD2 (ATLAS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2020-04-09T11:54:35.395200Z |
| Orbit solution date (soln_date, UTC) |
2026-03-11T21:13:03Z |
| Obs used |
768 |
| NEO |
- |
| M1 |
7.000 |
| K1 |
13.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-09-23.0000000 |
| e |
0.13358576 |
| q (au) |
4.577943 |
| a (au) |
5.283781 |
| i (deg) |
11.567837 |
| Ω (om, deg) |
179.665632 |
| ω (w, deg) |
123.430769 |
| M (ma, deg) |
13.511728 |
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 |
1.000 |
| 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) |
| 2026-03-26 00:00 |
07:31:17.91 |
+11:17:14.3 |
HIP 36553 |
5.53 |
| 2026-03-26 12:00 |
07:31:19.92 |
+11:18:16.5 |
HIP 36553 |
6.68 |
| 2026-03-27 00:00 |
07:31:22.11 |
+11:19:18.4 |
HIP 36553 |
7.84 |
| 2026-03-27 12:00 |
07:31:24.47 |
+11:20:19.7 |
HIP 36553 |
9.01 |
| 2026-03-28 00:00 |
07:31:27.01 |
+11:21:20.7 |
HIP 36553 |
10.19 |
| 2026-03-28 12:00 |
07:31:29.72 |
+11:22:21.1 |
HIP 36553 |
11.39 |
| 2026-03-29 00:00 |
07:31:32.60 |
+11:23:21.1 |
HIP 36553 |
12.60 |
| 2026-03-29 12:00 |
07:31:35.66 |
+11:24:20.7 |
HIP 36553 |
13.83 |
| 2026-03-30 00:00 |
07:31:38.89 |
+11:25:19.8 |
HIP 36553 |
15.08 |
| 2026-03-30 12:00 |
07:31:42.29 |
+11:26:18.4 |
HIP 36553 |
16.34 |
| 2026-03-31 00:00 |
07:31:45.86 |
+11:27:16.5 |
HIP 36553 |
17.62 |
| 2026-03-31 12:00 |
07:31:49.60 |
+11:28:14.2 |
HIP 36553 |
18.92 |
| 2026-04-01 00:00 |
07:31:53.51 |
+11:29:11.4 |
HIP 36553 |
20.23 |
| 2026-04-01 12:00 |
07:31:57.59 |
+11:30:08.1 |
HIP 36553 |
21.57 |
| 2026-04-02 00:00 |
07:32:01.85 |
+11:31:04.3 |
HIP 36752 |
22.65 |
| 2026-04-02 12:00 |
07:32:06.27 |
+11:32:00.0 |
HIP 36752 |
21.75 |
| 2026-04-03 00:00 |
07:32:10.85 |
+11:32:55.3 |
HIP 36752 |
20.87 |
| 2026-04-03 12:00 |
07:32:15.61 |
+11:33:50.0 |
HIP 36752 |
20.02 |
| 2026-04-04 00:00 |
07:32:20.53 |
+11:34:44.3 |
HIP 36752 |
19.20 |
| 2026-04-04 12:00 |
07:32:25.62 |
+11:35:38.0 |
HIP 36752 |
18.42 |
| 2026-04-05 00:00 |
07:32:30.87 |
+11:36:31.3 |
HIP 36752 |
17.71 |
| 2026-04-05 12:00 |
07:32:36.30 |
+11:37:24.0 |
HIP 36752 |
17.07 |
| 2026-04-06 00:00 |
07:32:41.88 |
+11:38:16.3 |
HIP 36752 |
16.53 |
| 2026-04-06 12:00 |
07:32:47.63 |
+11:39:08.0 |
HIP 36752 |
16.10 |
| 2026-04-07 00:00 |
07:32:53.55 |
+11:39:59.2 |
HIP 36752 |
15.79 |
| 2026-04-07 12:00 |
07:32:59.62 |
+11:40:49.9 |
HIP 36752 |
15.64 |
| 2026-04-08 00:00 |
07:33:05.86 |
+11:41:40.1 |
HIP 36752 |
15.64 |
| 2026-04-08 12:00 |
07:33:12.27 |
+11:42:29.7 |
HIP 36752 |
15.82 |
| 2026-04-09 00:00 |
07:33:18.83 |
+11:43:18.8 |
HIP 36752 |
16.17 |
| 2026-04-09 12:00 |
07:33:25.56 |
+11:44:07.4 |
HIP 36752 |
16.70 |
| 2026-04-10 00:00 |
07:33:32.45 |
+11:44:55.5 |
HIP 36752 |
17.40 |
| 2026-04-10 12:00 |
07:33:39.50 |
+11:45:43.0 |
HIP 36752 |
18.26 |
| 2026-04-11 00:00 |
07:33:46.70 |
+11:46:30.0 |
HIP 36752 |
19.26 |
| 2026-04-11 12:00 |
07:33:54.07 |
+11:47:16.5 |
HIP 36752 |
20.40 |
| 2026-04-12 00:00 |
07:34:01.59 |
+11:48:02.4 |
HIP 36752 |
21.66 |
| 2026-04-12 12:00 |
07:34:09.28 |
+11:48:47.7 |
HIP 36752 |
23.03 |
| 2026-04-13 00:00 |
07:34:17.12 |
+11:49:32.6 |
HIP 36752 |
24.51 |
| 2026-04-13 12:00 |
07:34:25.11 |
+11:50:16.8 |
HIP 36752 |
26.07 |
| 2026-04-14 00:00 |
07:34:33.27 |
+11:51:00.5 |
HIP 36843 |
27.28 |
| 2026-04-14 12:00 |
07:34:41.57 |
+11:51:43.7 |
HIP 36843 |
26.66 |
| 2026-04-15 00:00 |
07:34:50.04 |
+11:52:26.2 |
HIP 36843 |
26.22 |
| 2026-04-15 12:00 |
07:34:58.65 |
+11:53:08.3 |
HIP 36843 |
25.98 |
| 2026-04-16 00:00 |
07:35:07.42 |
+11:53:49.7 |
HIP 36843 |
25.94 |