메타데이터
| 항목 |
값 |
| Designation |
250P/Larson |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-02-01T18:36:20.934720Z |
| Orbit solution date (soln_date, UTC) |
2026-04-27T13:42:33Z |
| Obs used |
561 |
| NEO |
- |
| M1 |
14.700 |
| K1 |
10.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-06-06.0000000 |
| e |
0.40741678 |
| q (au) |
2.212279 |
| a (au) |
3.733281 |
| i (deg) |
13.289499 |
| Ω (om, deg) |
73.714545 |
| ω (w, deg) |
45.021503 |
| M (ma, deg) |
227.219604 |
밝기
산란 + 전체 선형
$$
M_a = (18.493 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
18.493 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.692 |
| k |
0.930 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
13:52:07.50 |
+01:17:59.0 |
HIP 67743 |
29.50 |
| 2026-05-12 12:00 |
13:51:48.48 |
+01:17:22.5 |
HIP 67743 |
30.53 |
| 2026-05-13 00:00 |
13:51:29.68 |
+01:16:44.2 |
HIP 67462 |
30.26 |
| 2026-05-13 12:00 |
13:51:11.10 |
+01:16:03.9 |
HIP 67462 |
25.78 |
| 2026-05-14 00:00 |
13:50:52.74 |
+01:15:21.7 |
HIP 67462 |
21.44 |
| 2026-05-14 12:00 |
13:50:34.61 |
+01:14:37.7 |
HIP 67462 |
17.33 |
| 2026-05-15 00:00 |
13:50:16.71 |
+01:13:51.7 |
HIP 67462 |
13.60 |
| 2026-05-15 12:00 |
13:49:59.05 |
+01:13:03.8 |
HIP 67462 |
10.58 |
| 2026-05-16 00:00 |
13:49:41.62 |
+01:12:14.0 |
HIP 67462 |
8.95 |
| 2026-05-16 12:00 |
13:49:24.43 |
+01:11:22.3 |
HIP 67462 |
9.39 |
| 2026-05-17 00:00 |
13:49:07.48 |
+01:10:28.7 |
HIP 67462 |
11.60 |
| 2026-05-17 12:00 |
13:48:50.78 |
+01:09:33.3 |
HIP 67462 |
14.76 |
| 2026-05-18 00:00 |
13:48:34.32 |
+01:08:35.9 |
HIP 67462 |
18.35 |
| 2026-05-18 12:00 |
13:48:18.12 |
+01:07:36.7 |
HIP 67462 |
22.14 |
| 2026-05-19 00:00 |
13:48:02.17 |
+01:06:35.6 |
HIP 67462 |
26.00 |
| 2026-05-19 12:00 |
13:47:46.47 |
+01:05:32.7 |
HIP 67462 |
29.89 |
| 2026-05-20 00:00 |
13:47:31.04 |
+01:04:27.9 |
HIP 67462 |
33.78 |
| 2026-05-20 12:00 |
13:47:15.86 |
+01:03:21.2 |
HIP 67152 |
34.21 |
| 2026-05-21 00:00 |
13:47:00.94 |
+01:02:12.8 |
HIP 67152 |
32.60 |
| 2026-05-21 12:00 |
13:46:46.29 |
+01:01:02.5 |
HIP 67152 |
31.45 |
| 2026-05-22 00:00 |
13:46:31.90 |
+00:59:50.3 |
HIP 67152 |
30.79 |
| 2026-05-22 12:00 |
13:46:17.78 |
+00:58:36.4 |
HIP 67152 |
30.65 |
| 2026-05-23 00:00 |
13:46:03.92 |
+00:57:20.7 |
HIP 67050 |
28.59 |
| 2026-05-23 12:00 |
13:45:50.34 |
+00:56:03.2 |
HIP 67050 |
25.04 |
| 2026-05-24 00:00 |
13:45:37.02 |
+00:54:43.9 |
HIP 67050 |
21.55 |
| 2026-05-24 12:00 |
13:45:23.98 |
+00:53:22.9 |
HIP 67050 |
18.14 |
| 2026-05-25 00:00 |
13:45:11.21 |
+00:52:00.2 |
HIP 67050 |
14.81 |
| 2026-05-25 12:00 |
13:44:58.72 |
+00:50:35.7 |
HIP 67050 |
11.59 |
| 2026-05-26 00:00 |
13:44:46.50 |
+00:49:09.4 |
HIP 67050 |
8.55 |
| 2026-05-26 12:00 |
13:44:34.56 |
+00:47:41.5 |
HIP 67050 |
5.88 |
| 2026-05-27 00:00 |
13:44:22.89 |
+00:46:11.9 |
HIP 67050 |
4.22 |
| 2026-05-27 12:00 |
13:44:11.50 |
+00:44:40.6 |
HIP 67050 |
4.67 |
| 2026-05-28 00:00 |
13:44:00.39 |
+00:43:07.6 |
HIP 67050 |
6.76 |
| 2026-05-28 12:00 |
13:43:49.56 |
+00:41:33.0 |
HIP 67050 |
9.41 |
| 2026-05-29 00:00 |
13:43:39.01 |
+00:39:56.7 |
HIP 67050 |
12.22 |
| 2026-05-29 12:00 |
13:43:28.74 |
+00:38:18.8 |
HIP 67050 |
15.08 |
| 2026-05-30 00:00 |
13:43:18.75 |
+00:36:39.2 |
HIP 67050 |
17.94 |
| 2026-05-30 12:00 |
13:43:09.04 |
+00:34:58.1 |
HIP 67050 |
20.79 |
| 2026-05-31 00:00 |
13:42:59.61 |
+00:33:15.4 |
HIP 67050 |
23.60 |
| 2026-05-31 12:00 |
13:42:50.46 |
+00:31:31.1 |
HIP 67050 |
26.39 |
| 2026-06-01 00:00 |
13:42:41.59 |
+00:29:45.2 |
HIP 67050 |
29.13 |
| 2026-06-01 12:00 |
13:42:33.01 |
+00:27:57.7 |
HIP 67050 |
31.84 |
| 2026-06-02 00:00 |
13:42:24.71 |
+00:26:08.7 |
HIP 66875 |
33.69 |