메타데이터
| 항목 |
값 |
| Designation |
13P/Olbers |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-06-30T17:24:30.931200Z |
| Orbit solution date (soln_date, UTC) |
2026-07-28T14:18:43Z |
| Obs used |
2605 |
| NEO |
Yes |
| M1 |
6.700 |
| K1 |
18.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-12-10.0000000 |
| e |
0.92970907 |
| q (au) |
1.173075 |
| a (au) |
16.688859 |
| i (deg) |
44.624173 |
| Ω (om, deg) |
85.872180 |
| ω (w, deg) |
64.511271 |
| M (ma, deg) |
341.224937 |
밝기
산란 + 전체 선형
$$
M_a = (6.023 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
6.023 |
| n |
6.000 |
| gf |
0.998 |
| gb |
-0.963 |
| k |
1.000 |
| δ90 |
9.995 |
| 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 |
| 2023-08-13 |
2024-06-30 |
+9.7493 |
-3.041 |
| 2024-06-30 |
2025-07-31 |
-0.2703 |
-1.962 |
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 |
18:47:49.31 |
-41:26:12.7 |
HIP 92310 |
13.09 |
| 2026-07-29 12:00 |
18:47:32.67 |
-41:26:23.7 |
HIP 92310 |
16.00 |
| 2026-07-30 00:00 |
18:47:16.14 |
-41:26:34.0 |
HIP 92158 |
17.10 |
| 2026-07-30 12:00 |
18:46:59.72 |
-41:26:43.3 |
HIP 92158 |
16.98 |
| 2026-07-31 00:00 |
18:46:43.43 |
-41:26:51.8 |
HIP 92158 |
17.40 |
| 2026-07-31 12:00 |
18:46:27.26 |
-41:26:59.5 |
HIP 92158 |
18.30 |
| 2026-08-01 00:00 |
18:46:11.21 |
-41:27:06.3 |
HIP 91956 |
17.23 |
| 2026-08-01 12:00 |
18:45:55.28 |
-41:27:12.3 |
HIP 91956 |
14.26 |
| 2026-08-02 00:00 |
18:45:39.48 |
-41:27:17.4 |
HIP 91956 |
11.31 |
| 2026-08-02 12:00 |
18:45:23.80 |
-41:27:21.8 |
HIP 91956 |
8.41 |
| 2026-08-03 00:00 |
18:45:08.25 |
-41:27:25.3 |
HIP 91956 |
5.56 |
| 2026-08-03 12:00 |
18:44:52.84 |
-41:27:28.0 |
HIP 91956 |
2.85 |
| 2026-08-04 00:00 |
18:44:37.55 |
-41:27:29.9 |
HIP 91956 |
1.43 |
| 2026-08-04 12:00 |
18:44:22.40 |
-41:27:30.9 |
HIP 91956 |
3.49 |
| 2026-08-05 00:00 |
18:44:07.38 |
-41:27:31.2 |
HIP 91956 |
6.17 |
| 2026-08-05 12:00 |
18:43:52.50 |
-41:27:30.8 |
HIP 91956 |
8.91 |
| 2026-08-06 00:00 |
18:43:37.75 |
-41:27:29.5 |
HIP 91956 |
11.64 |
| 2026-08-06 12:00 |
18:43:23.14 |
-41:27:27.5 |
HIP 91956 |
14.36 |
| 2026-08-07 00:00 |
18:43:08.67 |
-41:27:24.7 |
HIP 91956 |
17.06 |
| 2026-08-07 12:00 |
18:42:54.35 |
-41:27:21.2 |
HIP 91631 |
18.79 |
| 2026-08-08 00:00 |
18:42:40.17 |
-41:27:16.9 |
HIP 91631 |
16.13 |
| 2026-08-08 12:00 |
18:42:26.13 |
-41:27:11.8 |
HIP 91631 |
13.50 |
| 2026-08-09 00:00 |
18:42:12.23 |
-41:27:06.1 |
HIP 91631 |
10.90 |
| 2026-08-09 12:00 |
18:41:58.49 |
-41:26:59.6 |
HIP 91631 |
8.32 |
| 2026-08-10 00:00 |
18:41:44.89 |
-41:26:52.4 |
HIP 91631 |
5.77 |
| 2026-08-10 12:00 |
18:41:31.44 |
-41:26:44.5 |
HIP 91631 |
3.25 |
| 2026-08-11 00:00 |
18:41:18.15 |
-41:26:35.9 |
HIP 91631 |
0.77 |
| 2026-08-11 12:00 |
18:41:05.00 |
-41:26:26.6 |
HIP 91631 |
1.73 |
| 2026-08-12 00:00 |
18:40:52.01 |
-41:26:16.6 |
HIP 91631 |
4.16 |
| 2026-08-12 12:00 |
18:40:39.18 |
-41:26:05.9 |
HIP 91631 |
6.57 |
| 2026-08-13 00:00 |
18:40:26.50 |
-41:25:54.6 |
HIP 91631 |
8.96 |
| 2026-08-13 12:00 |
18:40:13.97 |
-41:25:42.6 |
HIP 91481 |
8.63 |
| 2026-08-14 00:00 |
18:40:01.61 |
-41:25:30.0 |
HIP 91481 |
6.35 |
| 2026-08-14 12:00 |
18:39:49.40 |
-41:25:16.7 |
HIP 91481 |
4.15 |
| 2026-08-15 00:00 |
18:39:37.36 |
-41:25:02.7 |
HIP 91481 |
2.19 |
| 2026-08-15 12:00 |
18:39:25.47 |
-41:24:48.2 |
HIP 91481 |
1.64 |
| 2026-08-16 00:00 |
18:39:13.75 |
-41:24:33.0 |
HIP 91481 |
3.24 |
| 2026-08-16 12:00 |
18:39:02.19 |
-41:24:17.3 |
HIP 91481 |
5.28 |
| 2026-08-17 00:00 |
18:38:50.80 |
-41:24:00.9 |
HIP 91481 |
7.37 |
| 2026-08-17 12:00 |
18:38:39.56 |
-41:23:43.9 |
HIP 91481 |
9.47 |
| 2026-08-18 00:00 |
18:38:28.50 |
-41:23:26.4 |
HIP 91481 |
11.55 |
| 2026-08-18 12:00 |
18:38:17.60 |
-41:23:08.3 |
HIP 91481 |
13.60 |
| 2026-08-19 00:00 |
18:38:06.86 |
-41:22:49.6 |
HIP 91336 |
14.66 |