메타데이터
| 항목 |
값 |
| Designation |
C/2000 D2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2000-03-08T14:43:54.082560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:04Z |
| Obs used |
79 |
| NEO |
- |
| M1 |
13.700 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2000-03-01.0000000 |
| e |
0.86703438 |
| q (au) |
2.297610 |
| a (au) |
17.279730 |
| i (deg) |
156.991926 |
| Ω (om, deg) |
235.887153 |
| ω (w, deg) |
117.682679 |
| M (ma, deg) |
359.895528 |
밝기
산란 + 전체 선형
$$
M_a = (18.087 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
18.087 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| 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 |
20:51:06.28 |
-40:43:58.2 |
HIP 102862 |
11.19 |
| 2026-07-29 12:00 |
20:51:00.99 |
-40:44:14.9 |
HIP 102862 |
10.67 |
| 2026-07-30 00:00 |
20:50:55.69 |
-40:44:31.4 |
HIP 102862 |
10.23 |
| 2026-07-30 12:00 |
20:50:50.39 |
-40:44:47.7 |
HIP 102862 |
9.87 |
| 2026-07-31 00:00 |
20:50:45.08 |
-40:45:03.8 |
HIP 102862 |
9.62 |
| 2026-07-31 12:00 |
20:50:39.78 |
-40:45:19.7 |
HIP 102862 |
9.46 |
| 2026-08-01 00:00 |
20:50:34.47 |
-40:45:35.4 |
HIP 102862 |
9.42 |
| 2026-08-01 12:00 |
20:50:29.16 |
-40:45:50.9 |
HIP 102862 |
9.49 |
| 2026-08-02 00:00 |
20:50:23.85 |
-40:46:06.2 |
HIP 102862 |
9.66 |
| 2026-08-02 12:00 |
20:50:18.54 |
-40:46:21.3 |
HIP 102862 |
9.94 |
| 2026-08-03 00:00 |
20:50:13.22 |
-40:46:36.2 |
HIP 102862 |
10.32 |
| 2026-08-03 12:00 |
20:50:07.91 |
-40:46:50.9 |
HIP 102862 |
10.77 |
| 2026-08-04 00:00 |
20:50:02.60 |
-40:47:05.3 |
HIP 102862 |
11.30 |
| 2026-08-04 12:00 |
20:49:57.29 |
-40:47:19.6 |
HIP 102862 |
11.90 |
| 2026-08-05 00:00 |
20:49:51.97 |
-40:47:33.6 |
HIP 102862 |
12.54 |
| 2026-08-05 12:00 |
20:49:46.66 |
-40:47:47.4 |
HIP 102862 |
13.24 |
| 2026-08-06 00:00 |
20:49:41.36 |
-40:48:01.0 |
HIP 102862 |
13.97 |
| 2026-08-06 12:00 |
20:49:36.05 |
-40:48:14.4 |
HIP 102862 |
14.73 |
| 2026-08-07 00:00 |
20:49:30.75 |
-40:48:27.5 |
HIP 102862 |
15.52 |
| 2026-08-07 12:00 |
20:49:25.45 |
-40:48:40.5 |
HIP 102862 |
16.34 |
| 2026-08-08 00:00 |
20:49:20.15 |
-40:48:53.2 |
HIP 102862 |
17.17 |
| 2026-08-08 12:00 |
20:49:14.86 |
-40:49:05.7 |
HIP 102862 |
18.03 |
| 2026-08-09 00:00 |
20:49:09.57 |
-40:49:18.0 |
HIP 102862 |
18.89 |
| 2026-08-09 12:00 |
20:49:04.29 |
-40:49:30.0 |
HIP 102862 |
19.77 |
| 2026-08-10 00:00 |
20:48:59.01 |
-40:49:41.9 |
HIP 102862 |
20.66 |
| 2026-08-10 12:00 |
20:48:53.73 |
-40:49:53.5 |
HIP 102862 |
21.55 |
| 2026-08-11 00:00 |
20:48:48.47 |
-40:50:04.8 |
HIP 102862 |
22.45 |
| 2026-08-11 12:00 |
20:48:43.20 |
-40:50:16.0 |
HIP 102862 |
23.36 |
| 2026-08-12 00:00 |
20:48:37.95 |
-40:50:26.9 |
HIP 102862 |
24.28 |
| 2026-08-12 12:00 |
20:48:32.70 |
-40:50:37.6 |
HIP 102862 |
25.20 |
| 2026-08-13 00:00 |
20:48:27.46 |
-40:50:48.1 |
HIP 102862 |
26.12 |
| 2026-08-13 12:00 |
20:48:22.23 |
-40:50:58.3 |
HIP 102862 |
27.04 |
| 2026-08-14 00:00 |
20:48:17.01 |
-40:51:08.3 |
HIP 102862 |
27.97 |
| 2026-08-14 12:00 |
20:48:11.80 |
-40:51:18.1 |
HIP 102862 |
28.90 |
| 2026-08-15 00:00 |
20:48:06.59 |
-40:51:27.6 |
HIP 102862 |
29.82 |
| 2026-08-15 12:00 |
20:48:01.40 |
-40:51:36.9 |
HIP 102862 |
30.75 |
| 2026-08-16 00:00 |
20:47:56.21 |
-40:51:46.0 |
HIP 102862 |
31.69 |
| 2026-08-16 12:00 |
20:47:51.04 |
-40:51:54.8 |
HIP 102862 |
32.62 |
| 2026-08-17 00:00 |
20:47:45.88 |
-40:52:03.4 |
HIP 102862 |
33.55 |
| 2026-08-17 12:00 |
20:47:40.72 |
-40:52:11.7 |
HIP 102862 |
34.48 |
| 2026-08-18 00:00 |
20:47:35.58 |
-40:52:19.9 |
HIP 102862 |
35.40 |
| 2026-08-18 12:00 |
20:47:30.46 |
-40:52:27.7 |
HIP 102417 |
36.12 |
| 2026-08-19 00:00 |
20:47:25.34 |
-40:52:35.4 |
HIP 102417 |
35.35 |