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 |
-0.500 |
| 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 |
| 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) |
| 2026-07-29 00:00 |
20:15:34.19 |
-26:29:53.7 |
HIP 99884 |
17.74 |
| 2026-07-29 12:00 |
20:15:22.90 |
-26:30:18.6 |
HIP 99884 |
18.19 |
| 2026-07-30 00:00 |
20:15:11.62 |
-26:30:43.3 |
HIP 99884 |
18.98 |
| 2026-07-30 12:00 |
20:15:00.36 |
-26:31:07.6 |
HIP 99884 |
20.06 |
| 2026-07-31 00:00 |
20:14:49.12 |
-26:31:31.7 |
HIP 99884 |
21.40 |
| 2026-07-31 12:00 |
20:14:37.89 |
-26:31:55.5 |
HIP 99884 |
22.94 |
| 2026-08-01 00:00 |
20:14:26.69 |
-26:32:19.0 |
HIP 99884 |
24.64 |
| 2026-08-01 12:00 |
20:14:15.50 |
-26:32:42.1 |
HIP 99884 |
26.48 |
| 2026-08-02 00:00 |
20:14:04.34 |
-26:33:05.0 |
HIP 99613 |
26.51 |
| 2026-08-02 12:00 |
20:13:53.20 |
-26:33:27.6 |
HIP 99613 |
25.47 |
| 2026-08-03 00:00 |
20:13:42.08 |
-26:33:49.9 |
HIP 99613 |
24.65 |
| 2026-08-03 12:00 |
20:13:30.98 |
-26:34:11.9 |
HIP 99536 |
23.38 |
| 2026-08-04 00:00 |
20:13:19.92 |
-26:34:33.5 |
HIP 99536 |
21.53 |
| 2026-08-04 12:00 |
20:13:08.88 |
-26:34:54.9 |
HIP 99536 |
19.84 |
| 2026-08-05 00:00 |
20:12:57.87 |
-26:35:15.9 |
HIP 99536 |
18.32 |
| 2026-08-05 12:00 |
20:12:46.89 |
-26:35:36.6 |
HIP 99536 |
17.04 |
| 2026-08-06 00:00 |
20:12:35.94 |
-26:35:57.0 |
HIP 99536 |
16.04 |
| 2026-08-06 12:00 |
20:12:25.02 |
-26:36:17.1 |
HIP 99536 |
15.37 |
| 2026-08-07 00:00 |
20:12:14.13 |
-26:36:36.9 |
HIP 99536 |
15.08 |
| 2026-08-07 12:00 |
20:12:03.28 |
-26:36:56.3 |
HIP 99536 |
15.18 |
| 2026-08-08 00:00 |
20:11:52.47 |
-26:37:15.4 |
HIP 99536 |
15.66 |
| 2026-08-08 12:00 |
20:11:41.69 |
-26:37:34.2 |
HIP 99536 |
16.49 |
| 2026-08-09 00:00 |
20:11:30.95 |
-26:37:52.6 |
HIP 99536 |
17.60 |
| 2026-08-09 12:00 |
20:11:20.25 |
-26:38:10.7 |
HIP 99536 |
18.95 |
| 2026-08-10 00:00 |
20:11:09.59 |
-26:38:28.5 |
HIP 99536 |
20.49 |
| 2026-08-10 12:00 |
20:10:58.98 |
-26:38:45.9 |
HIP 99536 |
22.17 |
| 2026-08-11 00:00 |
20:10:48.40 |
-26:39:03.0 |
HIP 99536 |
23.96 |
| 2026-08-11 12:00 |
20:10:37.87 |
-26:39:19.7 |
HIP 99536 |
25.84 |
| 2026-08-12 00:00 |
20:10:27.39 |
-26:39:36.1 |
HIP 99536 |
27.78 |
| 2026-08-12 12:00 |
20:10:16.95 |
-26:39:52.1 |
HIP 99536 |
29.77 |
| 2026-08-13 00:00 |
20:10:06.57 |
-26:40:07.8 |
HIP 99273 |
30.03 |
| 2026-08-13 12:00 |
20:09:56.23 |
-26:40:23.2 |
HIP 99273 |
29.28 |
| 2026-08-14 00:00 |
20:09:45.94 |
-26:40:38.2 |
HIP 99273 |
28.69 |
| 2026-08-14 12:00 |
20:09:35.70 |
-26:40:52.8 |
HIP 99273 |
28.28 |
| 2026-08-15 00:00 |
20:09:25.52 |
-26:41:07.1 |
HIP 99273 |
28.06 |
| 2026-08-15 12:00 |
20:09:15.39 |
-26:41:21.0 |
HIP 99273 |
28.01 |
| 2026-08-16 00:00 |
20:09:05.31 |
-26:41:34.6 |
HIP 99273 |
28.14 |
| 2026-08-16 12:00 |
20:08:55.30 |
-26:41:47.8 |
HIP 99273 |
28.45 |
| 2026-08-17 00:00 |
20:08:45.33 |
-26:42:00.6 |
HIP 99273 |
28.92 |
| 2026-08-17 12:00 |
20:08:35.43 |
-26:42:13.1 |
HIP 99070 |
29.18 |
| 2026-08-18 00:00 |
20:08:25.59 |
-26:42:25.2 |
HIP 99070 |
27.49 |
| 2026-08-18 12:00 |
20:08:15.80 |
-26:42:36.9 |
HIP 99070 |
25.89 |
| 2026-08-19 00:00 |
20:08:06.08 |
-26:42:48.3 |
HIP 99070 |
24.38 |