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 |
-0.500 |
| 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) |
| 2026-03-26 00:00 |
17:40:19.89 |
-22:29:44.0 |
HIP 86517 |
13.51 |
| 2026-03-26 12:00 |
17:40:22.09 |
-22:29:33.8 |
HIP 86517 |
13.11 |
| 2026-03-27 00:00 |
17:40:24.08 |
-22:29:23.5 |
HIP 86517 |
12.74 |
| 2026-03-27 12:00 |
17:40:25.87 |
-22:29:13.1 |
HIP 86517 |
12.39 |
| 2026-03-28 00:00 |
17:40:27.46 |
-22:29:02.5 |
HIP 86517 |
12.07 |
| 2026-03-28 12:00 |
17:40:28.84 |
-22:28:51.9 |
HIP 86517 |
11.77 |
| 2026-03-29 00:00 |
17:40:30.02 |
-22:28:41.1 |
HIP 86517 |
11.49 |
| 2026-03-29 12:00 |
17:40:31.00 |
-22:28:30.2 |
HIP 86517 |
11.24 |
| 2026-03-30 00:00 |
17:40:31.76 |
-22:28:19.3 |
HIP 86517 |
11.00 |
| 2026-03-30 12:00 |
17:40:32.33 |
-22:28:08.1 |
HIP 86517 |
10.78 |
| 2026-03-31 00:00 |
17:40:32.69 |
-22:27:56.9 |
HIP 86517 |
10.57 |
| 2026-03-31 12:00 |
17:40:32.84 |
-22:27:45.6 |
HIP 86517 |
10.39 |
| 2026-04-01 00:00 |
17:40:32.78 |
-22:27:34.1 |
HIP 86517 |
10.22 |
| 2026-04-01 12:00 |
17:40:32.52 |
-22:27:22.6 |
HIP 86517 |
10.06 |
| 2026-04-02 00:00 |
17:40:32.06 |
-22:27:10.9 |
HIP 86517 |
9.93 |
| 2026-04-02 12:00 |
17:40:31.38 |
-22:26:59.1 |
HIP 86517 |
9.82 |
| 2026-04-03 00:00 |
17:40:30.50 |
-22:26:47.2 |
HIP 86517 |
9.74 |
| 2026-04-03 12:00 |
17:40:29.42 |
-22:26:35.2 |
HIP 86517 |
9.68 |
| 2026-04-04 00:00 |
17:40:28.12 |
-22:26:23.1 |
HIP 86517 |
9.66 |
| 2026-04-04 12:00 |
17:40:26.62 |
-22:26:10.8 |
HIP 86517 |
9.68 |
| 2026-04-05 00:00 |
17:40:24.91 |
-22:25:58.5 |
HIP 86517 |
9.75 |
| 2026-04-05 12:00 |
17:40:22.99 |
-22:25:46.0 |
HIP 86517 |
9.86 |
| 2026-04-06 00:00 |
17:40:20.87 |
-22:25:33.4 |
HIP 86517 |
10.02 |
| 2026-04-06 12:00 |
17:40:18.53 |
-22:25:20.7 |
HIP 86517 |
10.25 |
| 2026-04-07 00:00 |
17:40:15.99 |
-22:25:07.9 |
HIP 86517 |
10.54 |
| 2026-04-07 12:00 |
17:40:13.24 |
-22:24:55.0 |
HIP 86517 |
10.89 |
| 2026-04-08 00:00 |
17:40:10.28 |
-22:24:41.9 |
HIP 86517 |
11.31 |
| 2026-04-08 12:00 |
17:40:07.12 |
-22:24:28.8 |
HIP 86517 |
11.79 |
| 2026-04-09 00:00 |
17:40:03.74 |
-22:24:15.5 |
HIP 86517 |
12.35 |
| 2026-04-09 12:00 |
17:40:00.16 |
-22:24:02.1 |
HIP 86517 |
12.98 |
| 2026-04-10 00:00 |
17:39:56.36 |
-22:23:48.6 |
HIP 86517 |
13.67 |
| 2026-04-10 12:00 |
17:39:52.36 |
-22:23:35.0 |
HIP 86517 |
14.43 |
| 2026-04-11 00:00 |
17:39:48.15 |
-22:23:21.3 |
HIP 86517 |
15.26 |
| 2026-04-11 12:00 |
17:39:43.73 |
-22:23:07.4 |
HIP 86517 |
16.15 |
| 2026-04-12 00:00 |
17:39:39.11 |
-22:22:53.5 |
HIP 86517 |
17.11 |
| 2026-04-12 12:00 |
17:39:34.27 |
-22:22:39.4 |
HIP 86517 |
18.13 |
| 2026-04-13 00:00 |
17:39:29.23 |
-22:22:25.2 |
HIP 86517 |
19.21 |
| 2026-04-13 12:00 |
17:39:23.98 |
-22:22:10.9 |
HIP 86517 |
20.35 |
| 2026-04-14 00:00 |
17:39:18.52 |
-22:21:56.4 |
HIP 86517 |
21.54 |
| 2026-04-14 12:00 |
17:39:12.86 |
-22:21:41.9 |
HIP 86303 |
20.71 |
| 2026-04-15 00:00 |
17:39:06.99 |
-22:21:27.2 |
HIP 86303 |
19.85 |
| 2026-04-15 12:00 |
17:39:00.91 |
-22:21:12.4 |
HIP 86303 |
19.02 |
| 2026-04-16 00:00 |
17:38:54.62 |
-22:20:57.5 |
HIP 86303 |
18.23 |