메타데이터
| 항목 |
값 |
| Designation |
P/2015 D6 (Lemmon-PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-07-21T02:31:34.800960Z |
| Orbit solution date (soln_date, UTC) |
2024-09-01T19:42:23Z |
| Obs used |
66 |
| NEO |
- |
| M1 |
7.600 |
| K1 |
16.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-08-03.0000000 |
| e |
0.36774122 |
| q (au) |
4.567753 |
| a (au) |
7.224499 |
| i (deg) |
20.225177 |
| Ω (om, deg) |
46.134037 |
| ω (w, deg) |
126.551812 |
| M (ma, deg) |
0.654493 |
밝기
산란 + 전체 선형
$$
M_a = (7.288 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
7.288 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.789 |
| 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 |
01:12:10.25 |
-06:35:34.3 |
HIP 5666 |
14.74 |
| 2026-07-29 12:00 |
01:12:09.48 |
-06:36:06.5 |
HIP 5666 |
14.45 |
| 2026-07-30 00:00 |
01:12:08.61 |
-06:36:39.3 |
HIP 5666 |
14.19 |
| 2026-07-30 12:00 |
01:12:07.64 |
-06:37:12.5 |
HIP 5666 |
13.96 |
| 2026-07-31 00:00 |
01:12:06.57 |
-06:37:46.3 |
HIP 5666 |
13.77 |
| 2026-07-31 12:00 |
01:12:05.41 |
-06:38:20.5 |
HIP 5666 |
13.62 |
| 2026-08-01 00:00 |
01:12:04.15 |
-06:38:55.3 |
HIP 5666 |
13.51 |
| 2026-08-01 12:00 |
01:12:02.79 |
-06:39:30.5 |
HIP 5666 |
13.44 |
| 2026-08-02 00:00 |
01:12:01.33 |
-06:40:06.3 |
HIP 5666 |
13.43 |
| 2026-08-02 12:00 |
01:11:59.78 |
-06:40:42.5 |
HIP 5666 |
13.47 |
| 2026-08-03 00:00 |
01:11:58.12 |
-06:41:19.2 |
HIP 5666 |
13.56 |
| 2026-08-03 12:00 |
01:11:56.37 |
-06:41:56.4 |
HIP 5666 |
13.72 |
| 2026-08-04 00:00 |
01:11:54.52 |
-06:42:34.1 |
HIP 5666 |
13.94 |
| 2026-08-04 12:00 |
01:11:52.57 |
-06:43:12.2 |
HIP 5666 |
14.21 |
| 2026-08-05 00:00 |
01:11:50.53 |
-06:43:50.8 |
HIP 5666 |
14.55 |
| 2026-08-05 12:00 |
01:11:48.39 |
-06:44:29.9 |
HIP 5666 |
14.95 |
| 2026-08-06 00:00 |
01:11:46.14 |
-06:45:09.4 |
HIP 5666 |
15.40 |
| 2026-08-06 12:00 |
01:11:43.81 |
-06:45:49.4 |
HIP 5666 |
15.91 |
| 2026-08-07 00:00 |
01:11:41.37 |
-06:46:29.8 |
HIP 5666 |
16.48 |
| 2026-08-07 12:00 |
01:11:38.83 |
-06:47:10.7 |
HIP 5666 |
17.11 |
| 2026-08-08 00:00 |
01:11:36.20 |
-06:47:52.1 |
HIP 5666 |
17.78 |
| 2026-08-08 12:00 |
01:11:33.47 |
-06:48:33.8 |
HIP 5666 |
18.50 |
| 2026-08-09 00:00 |
01:11:30.65 |
-06:49:16.0 |
HIP 5666 |
19.27 |
| 2026-08-09 12:00 |
01:11:27.72 |
-06:49:58.7 |
HIP 5666 |
20.08 |
| 2026-08-10 00:00 |
01:11:24.70 |
-06:50:41.7 |
HIP 5666 |
20.94 |
| 2026-08-10 12:00 |
01:11:21.58 |
-06:51:25.2 |
HIP 5666 |
21.84 |
| 2026-08-11 00:00 |
01:11:18.37 |
-06:52:09.1 |
HIP 5666 |
22.77 |
| 2026-08-11 12:00 |
01:11:15.05 |
-06:52:53.4 |
HIP 5666 |
23.75 |
| 2026-08-12 00:00 |
01:11:11.64 |
-06:53:38.1 |
HIP 5666 |
24.76 |
| 2026-08-12 12:00 |
01:11:08.14 |
-06:54:23.2 |
HIP 5666 |
25.80 |
| 2026-08-13 00:00 |
01:11:04.54 |
-06:55:08.7 |
HIP 5443 |
26.37 |
| 2026-08-13 12:00 |
01:11:00.84 |
-06:55:54.6 |
HIP 5443 |
25.18 |
| 2026-08-14 00:00 |
01:10:57.05 |
-06:56:40.8 |
HIP 5443 |
23.96 |
| 2026-08-14 12:00 |
01:10:53.16 |
-06:57:27.5 |
HIP 5443 |
22.73 |
| 2026-08-15 00:00 |
01:10:49.18 |
-06:58:14.5 |
HIP 5443 |
21.47 |
| 2026-08-15 12:00 |
01:10:45.11 |
-06:59:01.8 |
HIP 5443 |
20.18 |
| 2026-08-16 00:00 |
01:10:40.94 |
-06:59:49.5 |
HIP 5443 |
18.88 |
| 2026-08-16 12:00 |
01:10:36.67 |
-07:00:37.5 |
HIP 5443 |
17.55 |
| 2026-08-17 00:00 |
01:10:32.32 |
-07:01:25.9 |
HIP 5443 |
16.21 |
| 2026-08-17 12:00 |
01:10:27.87 |
-07:02:14.6 |
HIP 5443 |
14.84 |
| 2026-08-18 00:00 |
01:10:23.32 |
-07:03:03.7 |
HIP 5443 |
13.44 |
| 2026-08-18 12:00 |
01:10:18.69 |
-07:03:53.1 |
HIP 5443 |
12.03 |
| 2026-08-19 00:00 |
01:10:13.97 |
-07:04:42.7 |
HIP 5443 |
10.60 |