메타데이터
| 항목 |
값 |
| Designation |
440P/Kobayashi |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-03-26T11:34:50.255040Z |
| Orbit solution date (soln_date, UTC) |
2024-07-07T00:42:22Z |
| Obs used |
829 |
| NEO |
- |
| M1 |
7.400 |
| K1 |
32.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2014-11-01.0000000 |
| e |
0.76109197 |
| q (au) |
2.046559 |
| a (au) |
8.566304 |
| i (deg) |
12.379964 |
| Ω (om, deg) |
329.032199 |
| ω (w, deg) |
183.293142 |
| M (ma, deg) |
253.762760 |
밝기
산란 + 전체 선형
$$
M_a = (12.175 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.175 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.998 |
| 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 |
| 2021-12-08 |
2022-03-26 |
+29.4009 |
-9.339 |
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 |
20:29:42.94 |
-25:14:33.8 |
HIP 100947 |
31.68 |
| 2026-03-26 12:00 |
20:29:51.37 |
-25:14:15.1 |
HIP 101122 |
32.85 |
| 2026-03-27 00:00 |
20:29:59.71 |
-25:13:56.8 |
HIP 101122 |
33.18 |
| 2026-03-27 12:00 |
20:30:07.97 |
-25:13:38.9 |
HIP 101122 |
33.61 |
| 2026-03-28 00:00 |
20:30:16.14 |
-25:13:21.3 |
HIP 101122 |
34.12 |
| 2026-03-28 12:00 |
20:30:24.23 |
-25:13:04.0 |
HIP 101336 |
33.31 |
| 2026-03-29 00:00 |
20:30:32.22 |
-25:12:47.1 |
HIP 101336 |
31.73 |
| 2026-03-29 12:00 |
20:30:40.13 |
-25:12:30.6 |
HIP 101336 |
30.20 |
| 2026-03-30 00:00 |
20:30:47.96 |
-25:12:14.4 |
HIP 101336 |
28.72 |
| 2026-03-30 12:00 |
20:30:55.69 |
-25:11:58.5 |
HIP 101336 |
27.30 |
| 2026-03-31 00:00 |
20:31:03.33 |
-25:11:43.0 |
HIP 101336 |
25.94 |
| 2026-03-31 12:00 |
20:31:10.89 |
-25:11:27.9 |
HIP 101336 |
24.65 |
| 2026-04-01 00:00 |
20:31:18.35 |
-25:11:13.2 |
HIP 101336 |
23.43 |
| 2026-04-01 12:00 |
20:31:25.73 |
-25:10:58.8 |
HIP 101336 |
22.29 |
| 2026-04-02 00:00 |
20:31:33.01 |
-25:10:44.7 |
HIP 101336 |
21.24 |
| 2026-04-02 12:00 |
20:31:40.21 |
-25:10:31.0 |
HIP 101336 |
20.29 |
| 2026-04-03 00:00 |
20:31:47.31 |
-25:10:17.7 |
HIP 101336 |
19.44 |
| 2026-04-03 12:00 |
20:31:54.32 |
-25:10:04.8 |
HIP 101336 |
18.70 |
| 2026-04-04 00:00 |
20:32:01.24 |
-25:09:52.2 |
HIP 101384 |
17.59 |
| 2026-04-04 12:00 |
20:32:08.07 |
-25:09:40.0 |
HIP 101384 |
16.45 |
| 2026-04-05 00:00 |
20:32:14.80 |
-25:09:28.1 |
HIP 101384 |
15.41 |
| 2026-04-05 12:00 |
20:32:21.44 |
-25:09:16.7 |
HIP 101384 |
14.46 |
| 2026-04-06 00:00 |
20:32:27.99 |
-25:09:05.6 |
HIP 101384 |
13.64 |
| 2026-04-06 12:00 |
20:32:34.44 |
-25:08:54.8 |
HIP 101384 |
12.94 |
| 2026-04-07 00:00 |
20:32:40.80 |
-25:08:44.5 |
HIP 101384 |
12.40 |
| 2026-04-07 12:00 |
20:32:47.07 |
-25:08:34.5 |
HIP 101384 |
12.01 |
| 2026-04-08 00:00 |
20:32:53.23 |
-25:08:24.9 |
HIP 101384 |
11.79 |
| 2026-04-08 12:00 |
20:32:59.31 |
-25:08:15.7 |
HIP 101384 |
11.74 |
| 2026-04-09 00:00 |
20:33:05.28 |
-25:08:06.8 |
HIP 101384 |
11.86 |
| 2026-04-09 12:00 |
20:33:11.17 |
-25:07:58.3 |
HIP 101384 |
12.12 |
| 2026-04-10 00:00 |
20:33:16.95 |
-25:07:50.2 |
HIP 101384 |
12.52 |
| 2026-04-10 12:00 |
20:33:22.64 |
-25:07:42.5 |
HIP 101384 |
13.04 |
| 2026-04-11 00:00 |
20:33:28.22 |
-25:07:35.2 |
HIP 101384 |
13.65 |
| 2026-04-11 12:00 |
20:33:33.72 |
-25:07:28.3 |
HIP 101384 |
14.33 |
| 2026-04-12 00:00 |
20:33:39.11 |
-25:07:21.7 |
HIP 101384 |
15.08 |
| 2026-04-12 12:00 |
20:33:44.40 |
-25:07:15.5 |
HIP 101384 |
15.88 |
| 2026-04-13 00:00 |
20:33:49.59 |
-25:07:09.7 |
HIP 101384 |
16.71 |
| 2026-04-13 12:00 |
20:33:54.69 |
-25:07:04.3 |
HIP 101384 |
17.57 |
| 2026-04-14 00:00 |
20:33:59.68 |
-25:06:59.3 |
HIP 101384 |
18.44 |
| 2026-04-14 12:00 |
20:34:04.58 |
-25:06:54.7 |
HIP 101384 |
19.33 |
| 2026-04-15 00:00 |
20:34:09.37 |
-25:06:50.5 |
HIP 101384 |
20.22 |
| 2026-04-15 12:00 |
20:34:14.06 |
-25:06:46.6 |
HIP 101384 |
21.11 |
| 2026-04-16 00:00 |
20:34:18.65 |
-25:06:43.2 |
HIP 101384 |
22.00 |