메타데이터
| 항목 |
값 |
| Designation |
P/2015 B4 (Lemmon-PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-02-17T15:37:40.232640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:05Z |
| Obs used |
77 |
| NEO |
- |
| M1 |
15.200 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-11-20.0000000 |
| e |
0.56891192 |
| q (au) |
3.755337 |
| a (au) |
8.711300 |
| i (deg) |
1.742618 |
| Ω (om, deg) |
266.651081 |
| ω (w, deg) |
227.778528 |
| M (ma, deg) |
10.555113 |
밝기
산란 + 전체 선형
$$
M_a = (15.526 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.526 |
| n |
2.000 |
| gf |
0.947 |
| gb |
-0.830 |
| k |
0.993 |
| δ90 |
1.000 |
| 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) |
| 2026-05-12 00:00 |
20:56:00.03 |
-16:05:10.4 |
HIP 103386 |
17.88 |
| 2026-05-12 12:00 |
20:56:00.27 |
-16:05:06.0 |
HIP 103386 |
17.79 |
| 2026-05-13 00:00 |
20:56:00.43 |
-16:05:01.9 |
HIP 103386 |
17.71 |
| 2026-05-13 12:00 |
20:56:00.53 |
-16:04:58.0 |
HIP 103386 |
17.65 |
| 2026-05-14 00:00 |
20:56:00.54 |
-16:04:54.5 |
HIP 103386 |
17.60 |
| 2026-05-14 12:00 |
20:56:00.48 |
-16:04:51.3 |
HIP 103386 |
17.57 |
| 2026-05-15 00:00 |
20:56:00.34 |
-16:04:48.5 |
HIP 103386 |
17.55 |
| 2026-05-15 12:00 |
20:56:00.13 |
-16:04:45.9 |
HIP 103386 |
17.55 |
| 2026-05-16 00:00 |
20:55:59.85 |
-16:04:43.7 |
HIP 103386 |
17.56 |
| 2026-05-16 12:00 |
20:55:59.48 |
-16:04:41.8 |
HIP 103386 |
17.59 |
| 2026-05-17 00:00 |
20:55:59.04 |
-16:04:40.1 |
HIP 103386 |
17.64 |
| 2026-05-17 12:00 |
20:55:58.53 |
-16:04:38.8 |
HIP 103386 |
17.70 |
| 2026-05-18 00:00 |
20:55:57.94 |
-16:04:37.9 |
HIP 103386 |
17.78 |
| 2026-05-18 12:00 |
20:55:57.27 |
-16:04:37.2 |
HIP 103386 |
17.87 |
| 2026-05-19 00:00 |
20:55:56.53 |
-16:04:36.9 |
HIP 103386 |
17.99 |
| 2026-05-19 12:00 |
20:55:55.72 |
-16:04:36.8 |
HIP 103386 |
18.12 |
| 2026-05-20 00:00 |
20:55:54.83 |
-16:04:37.1 |
HIP 103386 |
18.26 |
| 2026-05-20 12:00 |
20:55:53.86 |
-16:04:37.7 |
HIP 103386 |
18.43 |
| 2026-05-21 00:00 |
20:55:52.82 |
-16:04:38.6 |
HIP 103386 |
18.61 |
| 2026-05-21 12:00 |
20:55:51.70 |
-16:04:39.8 |
HIP 103386 |
18.81 |
| 2026-05-22 00:00 |
20:55:50.51 |
-16:04:41.4 |
HIP 103386 |
19.02 |
| 2026-05-22 12:00 |
20:55:49.25 |
-16:04:43.2 |
HIP 103386 |
19.26 |
| 2026-05-23 00:00 |
20:55:47.91 |
-16:04:45.4 |
HIP 103386 |
19.51 |
| 2026-05-23 12:00 |
20:55:46.49 |
-16:04:47.9 |
HIP 103386 |
19.79 |
| 2026-05-24 00:00 |
20:55:45.00 |
-16:04:50.7 |
HIP 103386 |
20.08 |
| 2026-05-24 12:00 |
20:55:43.44 |
-16:04:53.7 |
HIP 103386 |
20.39 |
| 2026-05-25 00:00 |
20:55:41.81 |
-16:04:57.1 |
HIP 103386 |
20.72 |
| 2026-05-25 12:00 |
20:55:40.10 |
-16:05:00.9 |
HIP 103386 |
21.06 |
| 2026-05-26 00:00 |
20:55:38.32 |
-16:05:04.9 |
HIP 103386 |
21.43 |
| 2026-05-26 12:00 |
20:55:36.46 |
-16:05:09.2 |
HIP 103386 |
21.82 |
| 2026-05-27 00:00 |
20:55:34.53 |
-16:05:13.8 |
HIP 103386 |
22.22 |
| 2026-05-27 12:00 |
20:55:32.53 |
-16:05:18.8 |
HIP 103386 |
22.65 |
| 2026-05-28 00:00 |
20:55:30.46 |
-16:05:24.0 |
HIP 103386 |
23.09 |
| 2026-05-28 12:00 |
20:55:28.31 |
-16:05:29.6 |
HIP 103386 |
23.55 |
| 2026-05-29 00:00 |
20:55:26.09 |
-16:05:35.4 |
HIP 103386 |
24.04 |
| 2026-05-29 12:00 |
20:55:23.80 |
-16:05:41.6 |
HIP 103386 |
24.54 |
| 2026-05-30 00:00 |
20:55:21.44 |
-16:05:48.1 |
HIP 103386 |
25.06 |
| 2026-05-30 12:00 |
20:55:19.00 |
-16:05:54.8 |
HIP 103386 |
25.60 |
| 2026-05-31 00:00 |
20:55:16.49 |
-16:06:01.9 |
HIP 103386 |
26.16 |
| 2026-05-31 12:00 |
20:55:13.92 |
-16:06:09.3 |
HIP 103386 |
26.74 |
| 2026-06-01 00:00 |
20:55:11.27 |
-16:06:16.9 |
HIP 103386 |
27.34 |
| 2026-06-01 12:00 |
20:55:08.55 |
-16:06:24.9 |
HIP 103386 |
27.96 |
| 2026-06-02 00:00 |
20:55:05.76 |
-16:06:33.1 |
HIP 103386 |
28.60 |