메타데이터
| 항목 |
값 |
| Designation |
144P/Kushida |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-01-25T19:11:47.238720Z |
| Orbit solution date (soln_date, UTC) |
2024-12-30T09:07:42Z |
| Obs used |
3111 |
| NEO |
- |
| M1 |
12.900 |
| K1 |
18.750 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2023-08-12T00:16:24.096000Z |
| Discovery magnitude (MPC) |
21.40 V |
| Discovery observatory (MPC) |
A77 · Observatoire Chante-Perdrix, Dauban |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2023-01-18.0000000 |
| e |
0.63510624 |
| q (au) |
1.397336 |
| a (au) |
3.829432 |
| i (deg) |
3.930393 |
| Ω (om, deg) |
242.979419 |
| ω (w, deg) |
216.345483 |
| M (ma, deg) |
310.968153 |
밝기
산란 + 전체 선형
$$
M_a = (12.854 + 4.742\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.854 |
| n |
4.742 |
| gf |
1.000 |
| gb |
-1.000 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2023-06-22 |
2023-11-24 |
+5.1076 |
+0.335 |
| 2023-11-24 |
2024-01-25 |
+49.8144 |
-8.102 |
| 2024-01-26 |
2024-06-29 |
-7.8618 |
-1.021 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
16:46:36.29 |
-20:58:40.1 |
HIP 82244 |
22.57 |
| 2026-07-29 12:00 |
16:46:28.62 |
-20:58:26.9 |
HIP 82244 |
24.34 |
| 2026-07-30 00:00 |
16:46:21.14 |
-20:58:14.2 |
HIP 82244 |
26.07 |
| 2026-07-30 12:00 |
16:46:13.84 |
-20:58:01.7 |
HIP 82244 |
27.76 |
| 2026-07-31 00:00 |
16:46:06.73 |
-20:57:49.6 |
HIP 82244 |
29.41 |
| 2026-07-31 12:00 |
16:45:59.81 |
-20:57:37.9 |
HIP 82244 |
31.02 |
| 2026-08-01 00:00 |
16:45:53.07 |
-20:57:26.5 |
HIP 82244 |
32.59 |
| 2026-08-01 12:00 |
16:45:46.52 |
-20:57:15.5 |
HIP 81887 |
33.84 |
| 2026-08-02 00:00 |
16:45:40.15 |
-20:57:04.8 |
HIP 81887 |
32.44 |
| 2026-08-02 12:00 |
16:45:33.97 |
-20:56:54.5 |
HIP 81887 |
31.09 |
| 2026-08-03 00:00 |
16:45:27.98 |
-20:56:44.5 |
HIP 81887 |
29.79 |
| 2026-08-03 12:00 |
16:45:22.18 |
-20:56:35.0 |
HIP 81887 |
28.54 |
| 2026-08-04 00:00 |
16:45:16.57 |
-20:56:25.7 |
HIP 81887 |
27.35 |
| 2026-08-04 12:00 |
16:45:11.14 |
-20:56:16.8 |
HIP 81887 |
26.20 |
| 2026-08-05 00:00 |
16:45:05.90 |
-20:56:08.3 |
HIP 81887 |
25.11 |
| 2026-08-05 12:00 |
16:45:00.85 |
-20:56:00.2 |
HIP 81887 |
24.07 |
| 2026-08-06 00:00 |
16:44:55.99 |
-20:55:52.4 |
HIP 81887 |
23.08 |
| 2026-08-06 12:00 |
16:44:51.32 |
-20:55:45.0 |
HIP 81887 |
22.15 |
| 2026-08-07 00:00 |
16:44:46.84 |
-20:55:37.9 |
HIP 81887 |
21.27 |
| 2026-08-07 12:00 |
16:44:42.54 |
-20:55:31.2 |
HIP 81887 |
20.44 |
| 2026-08-08 00:00 |
16:44:38.43 |
-20:55:24.9 |
HIP 81887 |
19.67 |
| 2026-08-08 12:00 |
16:44:34.52 |
-20:55:18.9 |
HIP 81887 |
18.95 |
| 2026-08-09 00:00 |
16:44:30.79 |
-20:55:13.3 |
HIP 81887 |
18.28 |
| 2026-08-09 12:00 |
16:44:27.25 |
-20:55:08.1 |
HIP 81887 |
17.66 |
| 2026-08-10 00:00 |
16:44:23.91 |
-20:55:03.3 |
HIP 81887 |
17.10 |
| 2026-08-10 12:00 |
16:44:20.75 |
-20:54:58.8 |
HIP 81887 |
16.58 |
| 2026-08-11 00:00 |
16:44:17.78 |
-20:54:54.7 |
HIP 81887 |
16.11 |
| 2026-08-11 12:00 |
16:44:15.00 |
-20:54:50.9 |
HIP 81887 |
15.69 |
| 2026-08-12 00:00 |
16:44:12.41 |
-20:54:47.5 |
HIP 81887 |
15.32 |
| 2026-08-12 12:00 |
16:44:10.01 |
-20:54:44.5 |
HIP 81887 |
14.98 |
| 2026-08-13 00:00 |
16:44:07.80 |
-20:54:41.9 |
HIP 81887 |
14.69 |
| 2026-08-13 12:00 |
16:44:05.78 |
-20:54:39.6 |
HIP 81887 |
14.44 |
| 2026-08-14 00:00 |
16:44:03.95 |
-20:54:37.6 |
HIP 81887 |
14.22 |
| 2026-08-14 12:00 |
16:44:02.30 |
-20:54:36.1 |
HIP 81887 |
14.03 |
| 2026-08-15 00:00 |
16:44:00.85 |
-20:54:34.9 |
HIP 81887 |
13.88 |
| 2026-08-15 12:00 |
16:43:59.58 |
-20:54:34.1 |
HIP 81887 |
13.75 |
| 2026-08-16 00:00 |
16:43:58.50 |
-20:54:33.6 |
HIP 81887 |
13.65 |
| 2026-08-16 12:00 |
16:43:57.61 |
-20:54:33.5 |
HIP 81887 |
13.58 |
| 2026-08-17 00:00 |
16:43:56.90 |
-20:54:33.7 |
HIP 81887 |
13.53 |
| 2026-08-17 12:00 |
16:43:56.38 |
-20:54:34.3 |
HIP 81887 |
13.50 |
| 2026-08-18 00:00 |
16:43:56.05 |
-20:54:35.3 |
HIP 81887 |
13.49 |
| 2026-08-18 12:00 |
16:43:55.90 |
-20:54:36.6 |
HIP 81887 |
13.50 |
| 2026-08-19 00:00 |
16:43:55.94 |
-20:54:38.2 |
HIP 81887 |
13.53 |